2021 Prospectus - iShares

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                                                                             JUNE 29, 2021

              2021 Prospectus

         iShares Trust
         • iShares Core 5-10 Year USD Bond ETF | IMTB | NYSE ARCA

         The Securities and Exchange Commission (“SEC”) has not approved or disapproved
         these securities or passed upon the adequacy of this prospectus. Any representation to
         the contrary is a criminal offense.
iShares®
                             iShares Trust
                        iShares U.S. ETF Trust
       Supplement dated August 24, 2021 (the “Supplement”)
      to the Summary Prospectus (the “Summary Prospectus”),
                  Prospectus (the “Prospectus”) and
             Statement of Additional Information (“SAI”)
     for each of the Funds listed in Appendix A (each, a “Fund”)
The information in this Supplement updates information in, and
should be read in conjunction with, each Fund’s Summary
Prospectus, Prospectus and SAI.
References to the name of the Underlying Index in the Summary
Prospectus, Prospectus, and SAI for each Fund except for the
BlackRock Short Maturity Bond ETF and BlackRock Short Maturity
Municipal Bond ETF are hereby revised as follows:
  Former Underlying Index Name         New Underlying Index Name
Bloomberg Barclays 2021 Term         Bloomberg 2021 Term High
High Yield and Income Index          Yield and Income Index
Bloomberg Barclays 2022 Term         Bloomberg 2022 Term High
High Yield and Income Index          Yield and Income Index
Bloomberg Barclays 2023 Maturity     Bloomberg 2023 Maturity
Corporate Index                      Corporate Index
Bloomberg Barclays 2023 Maturity     Bloomberg 2023 Maturity High
High Quality Corporate Index         Quality Corporate Index
Bloomberg Barclays 2023 Term         Bloomberg 2023 Term High
High Yield and Income Index          Yield and Income Index
Bloomberg Barclays 2024 Term         Bloomberg 2024 Term High
High Yield and Income Index          Yield and Income Index
Bloomberg Barclays 2025 Term         Bloomberg 2025 Term High
High Yield and Income Index          Yield and Income Index
Bloomberg Barclays 2026 Term         Bloomberg 2026 Term High
High Yield and Income Index          Yield and Income Index
Bloomberg Barclays 2027 Term         Bloomberg 2027 Term High
High Yield and Income Index          Yield and Income Index
Bloomberg Barclays December          Bloomberg December 2021
2021 Maturity Corporate Index        Maturity Corporate Index
Bloomberg Barclays December          Bloomberg December 2022
2022 Maturity Corporate Index        Maturity Corporate Index
Former Underlying Index Name      New Underlying Index Name
Bloomberg Barclays December       Bloomberg December 2023
2023 Maturity Corporate Index     Maturity Corporate Index
Bloomberg Barclays December       Bloomberg December 2024
2024 Maturity Corporate Index     Maturity Corporate Index
Bloomberg Barclays December       Bloomberg December 2025
2025 Maturity Corporate Index     Maturity Corporate Index
Bloomberg Barclays December       Bloomberg December 2026
2026 Maturity Corporate Index     Maturity Corporate Index
Bloomberg Barclays December       Bloomberg December 2027
2027 Maturity Corporate Index     Maturity Corporate Index
Bloomberg Barclays December       Bloomberg December 2028
2028 Maturity Corporate Index     Maturity Corporate Index
Bloomberg Barclays December       Bloomberg December 2029
2029 Maturity Corporate Index     Maturity Corporate Index
Bloomberg Barclays December       Bloomberg December 2030
2030 Maturity Corporate Index     Maturity Corporate Index
Bloomberg Barclays December       Bloomberg December 2031
2031 Maturity Corporate Index     Maturity Corporate Index
Bloomberg Barclays Global         Bloomberg Global Aggregate ex
Aggregate ex USD 10% Issuer       USD 10% Issuer Capped
Capped (Hedged) Index             (Hedged) Index
Bloomberg Barclays MSCI Global    Bloomberg MSCI Global Green
Green Bond Select (USD Hedged)    Bond Select (USD Hedged) Index
Index
Bloomberg Barclays MSCI US        Bloomberg MSCI US Aggregate
Aggregate ESG Focus Index         ESG Focus Index
Bloomberg Barclays MSCI US        Bloomberg MSCI US Corporate
Corporate 1-5 Year ESG Focus      1-5 Year ESG Focus Index
Index
Bloomberg Barclays MSCI US        Bloomberg MSCI US Corporate
Corporate ESG Focus Index         ESG Focus Index
Bloomberg Barclays MSCI US High   Bloomberg MSCI US High Yield
Yield Choice ESG Screened Index   Choice ESG Screened Index
Bloomberg Barclays MSCI US        Bloomberg MSCI US Universal
Universal Choice ESG Screened     Choice ESG Screened Index
Index
Bloomberg Barclays U.S. Agency    Bloomberg U.S. Agency Bond
Bond Index                        Index
Former Underlying Index Name        New Underlying Index Name
Bloomberg Barclays U.S. CMBS        Bloomberg U.S. CMBS (ERISA
(ERISA Only) Index                  Only) Index
Bloomberg Barclays U.S.             Bloomberg U.S. Convertible Cash
Convertible Cash Pay Bond >         Pay Bond > $250MM Index
$250MM Index
Bloomberg Barclays U.S. Corporate   Bloomberg U.S. Corporate Aaa -
Aaa - A Capped Index                A Capped Index
Bloomberg Barclays U.S. Fixed       Bloomberg U.S. Fixed Income
Income Balanced Risk Index          Balanced Risk Index
Bloomberg Barclays U.S. GNMA        Bloomberg U.S. GNMA Bond
Bond Index                          Index
Bloomberg Barclays U.S.             Bloomberg U.S. Government/
Government/Credit Bond Index        Credit Bond Index
Bloomberg Barclays U.S.             Bloomberg U.S. Intermediate
Intermediate Government/Credit      Government/Credit Bond Index
Bond Index
Bloomberg Barclays U.S. Treasury    Bloomberg U.S. Treasury
Inflation Protected Securities      Inflation Protected Securities
(TIPS) Index (Series-L)             (TIPS) Index (Series-L)
Bloomberg Barclays U.S. Treasury    Bloomberg U.S. Treasury
Inflation-Protected Securities      Inflation-Protected Securities
(TIPS) 0-5 Years Index (Series-L)   (TIPS) 0-5 Years Index (Series-L)
Bloomberg Barclays U.S. Universal   Bloomberg U.S. Universal
10+ Year Index                      10+ Year Index
Bloomberg Barclays U.S. Universal   Bloomberg U.S. Universal
1-5 Year Index                      1-5 Year Index
Bloomberg Barclays U.S. Universal   Bloomberg U.S. Universal Index
Index
Bloomberg Barclays U.S. Aggregate   Bloomberg U.S. Aggregate Bond
Bond Index                          Index
Bloomberg Barclays US Floating      Bloomberg US Floating Rate
Rate Note < 5 Years Index           Note < 5 Years Index
Bloomberg Barclays US High Yield    Bloomberg US High Yield Fallen
Fallen Angel 3% Capped Index        Angel 3% Capped Index
Bloomberg Barclays U.S. MBS
Index                               Bloomberg U.S. MBS Index
Bloomberg Barclays U.S. Treasury    Bloomberg U.S. Treasury
Floating Rate Bond Index            Floating Rate Bond Index
Bloomberg Barclays U.S. Universal   Bloomberg U.S. Universal
5-10 Year Index                     5-10 Year Index
References to the name of the benchmark index in the Summary
Prospectus, Prospectus and SAI for each of the BlackRock Short
Maturity Bond ETF and BlackRock Short Maturity Municipal Bond
ETF are revised as follows:
 Former Benchmark Index Name         New Benchmark Index Name
Bloomberg Barclays Short-Term      Bloomberg Short-Term
Government/Corporate Index         Government/Corporate Index
Bloomberg Barclays Municipal       Bloomberg Municipal Bond:
Bond: 1 Year (1-2) Index           1 Year (1-2) Index
Appendix A
                        iShares Trust Funds
Supplement to the Summary Prospectus, Prospectus and SAI each
dated as of March 1, 2021:
iShares Core Total USD Bond Market ETF
iShares iBonds Mar 2023 Term Corporate ex-Financials ETF
Supplement to the Summary Prospectus and Prospectus both dated
as of March 1, 2021, and to the SAI dated as of March 1, 2021 (as
revised April 1, 2021):
iShares 0-5 Year TIPS Bond ETF
iShares Aaa - A Rated Corporate Bond ETF
iShares CMBS ETF
iShares Convertible Bond ETF
iShares Core 1-5 Year USD Bond ETF
iShares Core International Aggregate Bond ETF
iShares ESG Advanced High Yield Corporate Bond ETF
iShares Fallen Angels USD Bond ETF
iShares Global Green Bond ETF
iShares GNMA Bond ETF
iShares iBonds Dec 2021 Term Corporate ETF
iShares iBonds Dec 2022 Term Corporate ETF
iShares iBonds Dec 2023 Term Corporate ETF
iShares iBonds Dec 2024 Term Corporate ETF
iShares iBonds Dec 2025 Term Corporate ETF
iShares iBonds Dec 2026 Term Corporate ETF
iShares iBonds Dec 2027 Term Corporate ETF
iShares iBonds Dec 2028 Term Corporate ETF
iShares iBonds Dec 2029 Term Corporate ETF
iShares iBonds Dec 2030 Term Corporate ETF
iShares iBonds Mar 2023 Term Corporate ETF
iShares TIPS Bond ETF
iShares Treasury Floating Rate Bond ETF
iShares U.S. Fixed Income Balanced Risk Factor ETF
Supplement to the Summary Prospectus, Prospectus and SAI each
dated as of March 1, 2021 (as revised April 1, 2021):
iShares iBonds 2021 Term High Yield and Income ETF
iShares iBonds 2022 Term High Yield and Income ETF
iShares iBonds 2023 Term High Yield and Income ETF
iShares iBonds 2024 Term High Yield and Income ETF
iShares iBonds 2025 Term High Yield and Income ETF
iShares iBonds 2026 Term High Yield and Income ETF
iShares Floating Rate Bond ETF
Supplement to the Summary Prospectus, Prospectus and SAI each
dated as of June 29, 2021:
iShares Agency Bond ETF
iShares Core 5-10 Year USD Bond ETF
iShares Core 10+ Year USD Bond ETF
iShares Core U.S. Aggregate Bond ETF
iShares ESG Advanced Total USD Bond Market ETF
iShares ESG Aware 1-5 Year USD Corporate Bond ETF
iShares ESG Aware U.S. Aggregate Bond ETF
iShares ESG Aware USD Corporate Bond ETF
iShares Government/Credit Bond ETF
iShares Intermediate Government/Credit Bond ETF
iShares MBS ETF
Supplement to the Summary Prospectus dated as of June 23, 2021,
Prospectus and SAI each dated as of June 15, 2021:
iShares iBonds Dec 2031 Term Corporate ETF
Supplement to the Summary Prospectus dated as of July 1, 2021 (as
revised July 7, 2021), Prospectus dated as of June 23, 2021 (as
revised July 7, 2021) and SAI dated as of June 23, 2021:
iShares iBonds 2027 Term High Yield and Income ETF
                           iShares U.S. ETF Trust Funds
Supplement to the Summary Prospectus and Prospectus both dated
as of March 1, 2021, and to the SAI dated as of March 1, 2021 (as
revised April 27, 2021):
BlackRock Short Maturity Bond ETF
BlackRock Short Maturity Municipal Bond ETF
If you have any questions, please call 1-800-iShares (1-800-474-2737).

iShares® is a registered trademark of BlackRock Fund Advisors and its affiliates.
                                                                           IS-A-BBG-0821

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Table of Contents

        Table of Contents
                        Fund Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .               S-1
                        More Information About the Fund . . . . . . . . .                                              1
                        A Further Discussion of Principal Risks . .                                                    2
                        A Further Discussion of Other Risks . . . . . .                                              17
                        Portfolio Holdings Information . . . . . . . . . . . . .                                     21
                        Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .               22
                        Shareholder Information . . . . . . . . . . . . . . . . . . . .                              25
                        Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .         33
                        Financial Highlights . . . . . . . . . . . . . . . . . . . . . . . . . .                     33
                        Index Provider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .             35
                        Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          35

        BLOOMBERG® is a trademark of Bloomberg Finance L.P. and its affiliates (collectively, “Bloomberg”).
        BARCLAYS® is a trademark of Barclays Bank PLC (collectively with its affiliates, “Barclays”), used under license.
        “Bloomberg Barclays U.S. Universal 5-10 Year Index” is a trademark of Bloomberg and its licensors and has
        been licensed for use for certain purposes by BlackRock Fund Advisors or its affiliates. iShares® and
        BlackRock® are registered trademarks of BlackRock Fund Advisors and its affiliates.

                                                                i
Table of Contents

           iSHARES® CORE 5-10 YEAR USD BOND ETF
                         Ticker: IMTB                         Stock Exchange: NYSE Arca

        Investment Objective
        The iShares Core 5-10 Year USD Bond ETF (the “Fund”) seeks to track the investment
        results of an index composed of U.S. dollar-denominated bonds that are rated either
        investment-grade or high yield with remaining effective maturities between five and ten
        years.

        Fees and Expenses
        The following table describes the fees and expenses that you will incur if you buy, hold
        and sell shares of the Fund. The investment advisory agreement between iShares Trust
        (the “Trust”) and BlackRock Fund Advisors (“BFA”) (the “Investment Advisory
        Agreement”) provides that BFA will pay all operating expenses of the Fund, except the
        management fees, interest expenses, taxes, expenses incurred with respect to the
        acquisition and disposition of portfolio securities and the execution of portfolio
        transactions, including brokerage commissions, distribution fees or expenses, litigation
        expenses and any extraordinary expenses. The Fund may incur “Acquired Fund Fees
        and Expenses.” Acquired Fund Fees and Expenses reflect the Fund’s pro rata share of
        the fees and expenses incurred by investing in other investment companies. The
        impact of Acquired Fund Fees and Expenses is included in the total returns of the Fund.
        Acquired Fund Fees and Expenses are not included in the calculation of the ratio of
        expenses to average net assets shown in the Financial Highlights section of the Fund’s
        prospectus (the “Prospectus”). BFA, the investment adviser to the Fund, has
        contractually agreed to waive a portion of its management fees in an amount equal to
        the Acquired Fund Fees and Expenses, if any, attributable to investments by the Fund
        in other registered investment companies advised by BFA or its affiliates, through
        February 28, 2026. The contractual waiver may be terminated prior to February 28,
        2026 only upon written agreement of the Trust and BFA.
        You may pay other fees, such as brokerage commissions and other fees to financial
        intermediaries, which are not reflected in the tables and examples below.
                                                 Annual Fund Operating Expenses
                                          (ongoing expenses that you pay each year as a
                                           percentage of the value of your investments)

                                                                                                         Total Annual
                                                                                                             Fund
                         Distribution                                        Total Annual                 Operating
                             and                          Acquired Fund          Fund                      Expenses
        Management      Service (12b-1)       Other           Fees            Operating                      After
           Fees              Fees           Expenses1     and Expenses        Expenses      Fee Waiver    Fee Waiver

          0.06%             None             0.00%            0.01%            0.07%        (0.01)%        0.06%

          1
              The amount rounded to 0.00%.

                                                              S-1
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        Example. This Example is intended to help you compare the cost of owning shares of
        the Fund with the cost of investing in other funds. The Example assumes that you
        invest $10,000 in the Fund for the time periods indicated and then sell all of your
        shares at the end of those periods. The Example also assumes that your investment
        has a 5% return each year and that the Fund’s operating expenses remain the same.
        Although your actual costs may be higher or lower, based on these assumptions, your
        costs would be:

        1 Year                    3 Years                       5 Years                    10 Years
          $6                        $19                           $34                         $85

        Portfolio Turnover. The Fund may pay               investment-grade and high yield U.S.
        transaction costs, such as commissions,            corporate bonds, mortgage-backed
        when it buys and sells securities (or              pass-through securities (“MBS”),
        “turns over” its portfolio). A higher              commercial mortgage-backed securities
        portfolio turnover rate may indicate               (“CMBS”), asset-backed securities
        higher transaction costs and may result            (“ABS”), Eurodollar bonds (i.e., U.S.
        in higher taxes when Fund shares are               dollar-denominated bonds issued by
        held in a taxable account. These costs,            foreign issuers outside the U.S.), bonds
        which are not reflected in the Annual              registered with the SEC or exempt from
        Fund Operating Expenses or in the                  registration at the time of issuance, or
        Example, affect the Fund’s                         offered pursuant to Rule 144A under the
        performance. During the most recent                Securities Act of 1933, as amended (the
        fiscal year, the Fund’s portfolio turnover         “1933 Act”) with or without registration
        rate was 384% of the average value of              rights (“Rule 144A Bonds”) and
        its portfolio.                                     emerging market bonds. The Underlying
                                                           Index is a subset of the Bloomberg
        Principal Investment                               Barclays U.S. Universal Index.
        Strategies                                         As of February 28, 2021, a significant
        The Fund seeks to track the investment             portion of the Underlying Index is
        results of the Bloomberg Barclays U.S.             represented by MBS and U.S. Treasury
        Universal 5-10 Year Index (the                     securities. A significant portion of the
        “Underlying Index”), which measures                Underlying Index is composed of MBS
        the performance of U.S. dollar-                    that include 20-year and 30-year
        denominated taxable bonds that are                 mortgages. These MBS are included in
        rated either investment-grade or high              the Underlying Index because their
        yield (as determined by Bloomberg                  effective duration has historically been
        Index Services Limited (the “Index                 more consistent with the duration of
        Provider” or “Bloomberg”)) with                    non-callable 5-10 year bonds due to
        remaining effective maturities between             prepayments. The components of the
        five and ten years. The Underlying Index           Underlying Index are likely to change
        includes U.S. Treasury bonds,                      over time. The securities in the
        government-related bonds (i.e., U.S. and           Underlying Index must be denominated
        non-U.S. agencies, sovereign,                      in U.S. dollars and non-convertible.
        supranational and local authority debt),           Excluded from the Underlying Index are

                                                     S-2
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        tax-exempt municipal securities, coupon           may invest up to 10% of its assets in
        issues that have been stripped from               certain futures, options and swap
        bonds, structured notes, private                  contracts, cash and cash equivalents,
        placements (excluding Rule 144A                   including shares of money market funds
        Bonds) and inflation-linked bonds.                advised by BFA or its affiliates
        BFA uses a “passive” or indexing                  (“BlackRock Cash Funds”), as well as in
        approach to try to achieve the Fund’s             securities not included in the Underlying
        investment objective. Unlike many                 Index, but which BFA believes will help
        investment companies, the Fund does               the Fund track the Underlying Index.
        not try to “beat” the index it tracks and         From time to time when conditions
        does not seek temporary defensive                 warrant, however, the Fund may invest
        positions when markets decline or                 at least 80% of its assets in the
        appear overvalued.                                component securities of the Underlying
                                                          Index and may invest up to 20% of its
        Indexing may eliminate the chance that            assets in certain futures, options and
        the Fund will substantially outperform            swap contracts, cash and cash
        the Underlying Index but also may                 equivalents, including shares of
        reduce some of the risks of active                BlackRock Cash Funds, as well as in
        management, such as poor security                 securities not included in the Underlying
        selection. Indexing seeks to achieve              Index, but which BFA believes will help
        lower costs and better after-tax                  the Fund track the Underlying Index. The
        performance by aiming to keep portfolio           Fund seeks to track the investment
        turnover low in comparison to actively            results of the Underlying Index before
        managed investment companies.                     fees and expenses of the Fund.
        BFA uses a representative sampling                The Fund may lend securities
        indexing strategy to manage the Fund.             representing up to one-third of the value
        “Representative sampling” is an                   of the Fund’s total assets (including the
        indexing strategy that involves investing         value of any collateral received).
        in a representative sample of securities
        that collectively has an investment               The Underlying Index is sponsored by
        profile similar to that of an applicable          Bloomberg, which is independent of the
        underlying index. The securities                  Fund and BFA. The Index Provider
        selected are expected to have, in the             determines the composition and relative
        aggregate, investment characteristics             weightings of the securities in the
        (based on factors such as market value            Underlying Index and publishes
        and industry weightings), fundamental             information regarding the market value
        characteristics (such as return                   of the Underlying Index.
        variability, duration, maturity, credit           Industry Concentration Policy. The
        ratings and yield) and liquidity measures         Fund will concentrate its investments
        similar to those of an applicable                 (i.e., hold 25% or more of its total
        underlying index. The Fund may or may             assets) in a particular industry or group
        not hold all of the securities in the             of industries to approximately the same
        Underlying Index.                                 extent that the Underlying Index is
        The Fund generally will invest at least           concentrated. For purposes of this
        90% of its assets in the component                limitation, securities of the U.S.
        securities of the Underlying Index and            government (including its agencies and

                                                    S-3
Table of Contents

        instrumentalities), repurchase                     forward to create or redeem, Fund
        agreements collateralized by U.S.                  shares may be more likely to trade at a
        government securities, and securities of           premium or discount to NAV and
        state or municipal governments and                 possibly face trading halts or delisting.
        their political subdivisions are not               Call Risk. During periods of falling
        considered to be issued by members of              interest rates, an issuer of a callable
        any industry.                                      bond held by the Fund may “call” or
        Summary of Principal Risks                         repay the security before its stated
                                                           maturity, and the Fund may have to
        As with any investment, you could lose             reinvest the proceeds in securities with
        all or part of your investment in the              lower yields, which would result in a
        Fund, and the Fund’s performance could             decline in the Fund’s income, or in
        trail that of other investments. The Fund          securities with greater risks or with
        is subject to certain risks, including the         other less favorable features.
        principal risks noted below, any of
        which may adversely affect the Fund’s              Concentration Risk. The Fund may be
        net asset value per share (“NAV”),                 susceptible to an increased risk of loss,
        trading price, yield, total return and             including losses due to adverse events
        ability to meet its investment objective.          that affect the Fund’s investments more
        The order of the below risk factors does           than the market as a whole, to the
        not indicate the significance of any               extent that the Fund’s investments are
        particular risk factor.                            concentrated in the securities and/or
                                                           other assets of a particular issuer or
        Asset Class Risk. Securities and other             issuers, country, group of countries,
        assets in the Underlying Index or in the           region, market, industry, group of
        Fund’s portfolio may underperform in               industries, sector, market segment or
        comparison to the general financial                asset class.
        markets, a particular financial market or
        other asset classes.                               Credit Risk. Debt issuers and other
                                                           counterparties may be unable or
        Authorized Participant Concentration               unwilling to make timely interest and/or
        Risk. Only an Authorized Participant (as           principal payments when due or
        defined in the Creations and                       otherwise honor their obligations.
        Redemptions section of the Prospectus)             Changes in an issuer’s credit rating or
        may engage in creation or redemption               the market’s perception of an issuer’s
        transactions directly with the Fund, and           creditworthiness may also adversely
        none of those Authorized Participants is           affect the value of the Fund’s
        obligated to engage in creation and/or             investment in that issuer. The degree of
        redemption transactions. The Fund has              credit risk depends on an issuer’s or
        a limited number of institutions that              counterparty’s financial condition and
        may act as Authorized Participants on              on the terms of an obligation.
        an agency basis (i.e., on behalf of other
        market participants). To the extent that           Cybersecurity Risk. Failures or
        Authorized Participants exit the                   breaches of the electronic systems of
        business or are unable to proceed with             the Fund, the Fund’s adviser, distributor,
        creation or redemption orders with                 the Index Provider and other service
        respect to the Fund and no other                   providers, market makers, Authorized
        Authorized Participant is able to step             Participants or the issuers of securities

                                                     S-4
Table of Contents

        in which the Fund invests have the               which may include those bonds rated
        ability to cause disruptions, negatively         below “BBB-” by Standard & Poor’s®
        impact the Fund’s business operations            Global Ratings, a subsidiary of S&P
        and/or potentially result in financial           Global (“S&P Global Ratings”) and Fitch
        losses to the Fund and its shareholders.         Ratings, Inc. (“Fitch”) or below “Baa3”
        While the Fund has established business          by Moody’s Investors Service, Inc.
        continuity plans and risk management             (“Moody’s”)), or are unrated, may be
        systems seeking to address system                deemed speculative, may involve
        breaches or failures, there are inherent         greater levels of risk than higher-rated
        limitations in such plans and systems.           securities of similar maturity and may
        Furthermore, the Fund cannot control             be more likely to default.
        the cybersecurity plans and systems of           Income Risk. The Fund’s income may
        the Fund’s Index Provider and other              decline if interest rates fall. This decline
        service providers, market makers,                in income can occur because the Fund
        Authorized Participants or issuers of            may subsequently invest in lower-
        securities in which the Fund invests.            yielding bonds as bonds in its portfolio
        Extension Risk. During periods of rising         mature, are near maturity or are called,
        interest rates, certain debt obligations         bonds in the Underlying Index are
        may be paid off substantially more               substituted, or the Fund otherwise
        slowly than originally anticipated and           needs to purchase additional bonds.
        the value of those securities may fall           Index-Related Risk. There is no
        sharply, resulting in a decline in the           guarantee that the Fund’s investment
        Fund’s income and potentially in the             results will have a high degree of
        value of the Fund’s investments.                 correlation to those of the Underlying
        Geographic Risk. A natural disaster              Index or that the Fund will achieve its
        could occur in a geographic region in            investment objective. Market
        which the Fund invests, which could              disruptions and regulatory restrictions
        adversely affect the economy or the              could have an adverse effect on the
        business operations of companies in the          Fund’s ability to adjust its exposure to
        specific geographic region, causing an           the required levels in order to track the
        adverse impact on the Fund’s                     Underlying Index. Errors in index data,
        investments in, or which are exposed to,         index computations or the construction
        the affected region.                             of the Underlying Index in accordance
        High Portfolio Turnover Risk. High               with its methodology may occur from
        portfolio turnover (considered by the            time to time and may not be identified
        Fund to mean higher than 100%                    and corrected by the Index Provider for
        annually) may result in increased                a period of time or at all, which may
        transaction costs to the Fund, including         have an adverse impact on the Fund and
        brokerage commissions, dealer mark-              its shareholders. Unusual market
        ups and other transaction costs on the           conditions may cause the Index
        sale of the securities and on                    Provider to postpone a scheduled
        reinvestment in other securities.                rebalance, which could cause the
                                                         Underlying Index to vary from its normal
        High Yield Securities Risk. Securities           or expected composition.
        that are rated below investment-grade
        (commonly referred to as “junk bonds,”

                                                   S-5
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        Infectious Illness Risk. An outbreak of             and may adversely affect the liquidity of
        an infectious respiratory illness, COVID-           certain fixed-income investments,
        19, caused by a novel coronavirus has               including those held by the Fund. The
        resulted in travel restrictions, disruption         historically low interest rate
        of healthcare systems, prolonged                    environment heightens the risks
        quarantines, cancellations, supply chain            associated with rising interest rates.
        disruptions, lower consumer demand,                 Issuer Risk. The performance of the
        layoffs, ratings downgrades, defaults               Fund depends on the performance of
        and other significant economic impacts.             individual securities to which the Fund
        Certain markets have experienced                    has exposure. The Fund may be
        temporary closures, extreme volatility,             adversely affected if an issuer of
        severe losses, reduced liquidity and                underlying securities held by the Fund is
        increased trading costs. These events               unable or unwilling to repay principal or
        will have an impact on the Fund and its             interest when due. Changes in the
        investments and could impact the                    financial condition or credit rating of an
        Fund’s ability to purchase or sell                  issuer of those securities may cause the
        securities or cause elevated tracking               value of the securities to decline.
        error and increased premiums or
        discounts to the Fund’s NAV. Other                  Management Risk. As the Fund will not
        infectious illness outbreaks in the future          fully replicate the Underlying Index, it is
        may result in similar impacts.                      subject to the risk that BFA’s
                                                            investment strategy may not produce
        Interest Rate Risk. During periods of               the intended results.
        very low or negative interest rates, the
        Fund may be unable to maintain positive             Market Risk. The Fund could lose
        returns or pay dividends to Fund                    money over short periods due to short-
        shareholders. Very low or negative                  term market movements and over
        interest rates may magnify interest rate            longer periods during more prolonged
        risk. Changing interest rates, including            market downturns. Local, regional or
        rates that fall below zero, may have                global events such as war, acts of
        unpredictable effects on markets, result            terrorism, the spread of infectious
        in heightened market volatility and                 illness or other public health issues,
        detract from the Fund’s performance to              recessions, or other events could have a
        the extent the Fund is exposed to such              significant impact on the Fund and its
        interest rates. Additionally, under                 investments and could result in
        certain market conditions in which                  increased premiums or discounts to the
        interest rates are low and the market               Fund’s NAV.
        prices for portfolio securities have                Market Trading Risk. The Fund faces
        increased, the Fund may have a very low             numerous market trading risks,
        or even negative yield. A low or negative           including the potential lack of an active
        yield would cause the Fund to lose                  market for Fund shares, losses from
        money in certain conditions and over                trading in secondary markets, periods of
        certain time periods. An increase in                high volatility and disruptions in the
        interest rates will generally cause the             creation/redemption process. ANY OF
        value of securities held by the Fund to             THESE FACTORS, AMONG OTHERS,
        decline, may lead to heightened                     MAY LEAD TO THE FUND’S SHARES
        volatility in the fixed-income markets

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        TRADING AT A PREMIUM OR DISCOUNT                   may cause the Fund to have to reinvest
        TO NAV.                                            in securities with lower yields or higher
        Money Market Instruments Risk. The                 risk of default, resulting in a decline in
        value of money market instruments may              the Fund’s income or return potential.
        be affected by changing interest rates             Risk of Investing in Russia. Investing
        and by changes in the credit ratings of            in Russian securities involves significant
        the investments. If a significant amount           risks, including legal, regulatory,
        of the Fund’s assets are invested in               currency and economic risks that are
        money market instruments, it will be               specific to Russia. In addition, investing
        more difficult for the Fund to achieve its         in Russian securities involves risks
        investment objective. An investment in             associated with the settlement of
        a money market fund is not insured or              portfolio transactions and loss of the
        guaranteed by the Federal Deposit                  Fund’s ownership rights in its portfolio
        Insurance Corporation (“FDIC”) or any              securities as a result of the system of
        other government agency. It is possible            share registration and custody in
        to lose money by investing in a money              Russia. A number of jurisdictions,
        market fund. Money market funds other              including the U.S., Canada and the
        than government money market funds                 European Union (the “EU”), have
        or retail money market funds “float”               imposed economic sanctions on certain
        their NAV instead of using a stable                Russian individuals and Russian
        $1.00 per share price.                             corporate entities. Additionally, Russia
        Operational Risk. The Fund is exposed              is alleged to have participated in state-
        to operational risks arising from a                sponsored cyberattacks against foreign
        number of factors, including, but not              companies and foreign governments.
        limited to, human error, processing and            Actual and threatened responses to
        communication errors, errors of the                such activity, including purchasing
        Fund’s service providers, counterparties           restrictions, sanctions, tariffs or
        or other third-parties, failed or                  cyberattacks on the Russian
        inadequate processes and technology                government or Russian companies, may
        or systems failures. The Fund and BFA              impact Russia’s economy and Russian
        seek to reduce these operational risks             issuers of securities in which the Fund
        through controls and procedures.                   invests.
        However, these measures do not                     Risk of Investing in Saudi Arabia. The
        address every possible risk and may be             ability of foreign investors (such as the
        inadequate to address significant                  Fund) to invest in the securities of Saudi
        operational risks.                                 Arabian issuers is relatively new. Such
        Passive Investment Risk. The Fund is               ability could be restricted by the Saudi
        not actively managed, and BFA generally            Arabian government at any time, and
        does not attempt to take defensive                 unforeseen risks could materialize with
        positions under any market conditions,             respect to foreign ownership in such
        including declining markets.                       securities. The economy of Saudi Arabia
                                                           is dominated by petroleum exports. A
        Prepayment Risk. During periods of                 sustained decrease in petroleum prices
        falling interest rates, issuers of certain         could have a negative impact on all
        debt obligations may repay principal               aspects of the economy. Investments in
        prior to the security’s maturity, which            the securities of Saudi Arabian issuers

                                                     S-7
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        involve risks not typically associated             or region’s security may cause
        with investments in securities of issuers          uncertainty in its markets and may
        in more developed countries that may               adversely affect its economy and the
        negatively affect the value of the Fund’s          Fund’s investments.
        investments. Such heightened risks may             Tracking Error Risk. The Fund may be
        include, among others, expropriation               subject to tracking error, which is the
        and/or nationalization of assets,                  divergence of the Fund’s performance
        restrictions on and government                     from that of the Underlying Index.
        intervention in international trade,               Tracking error may occur because of
        confiscatory taxation, political                   differences between the securities and
        instability, including authoritarian and/          other instruments held in the Fund’s
        or military involvement in governmental            portfolio and those included in the
        decision making, armed conflict, crime             Underlying Index, pricing
        and instability as a result of religious,          differences (including, as applicable,
        ethnic and/or socioeconomic unrest.                differences between a security’s price
        There remains the possibility that                 at the local market close and the Fund’s
        instability in the larger Middle East              valuation of a security at the time of
        region could adversely impact the                  calculation of the Fund’s NAV),
        economy of Saudi Arabia, and there is              transaction costs incurred by the Fund,
        no assurance of political stability in             the Fund’s holding of uninvested cash,
        Saudi Arabia.                                      differences in timing of the accrual of or
        Risk of Investing in the U.S. Certain              the valuation of distributions, the
        changes in the U.S. economy, such as               requirements to maintain pass-through
        when the U.S. economy weakens or                   tax treatment, portfolio transactions
        when its financial markets decline, may            carried out to minimize the distribution
        have an adverse effect on the securities           of capital gains to shareholders,
        to which the Fund has exposure.                    acceptance of custom baskets, changes
        Securities Lending Risk. The Fund may              to the Underlying Index or the costs to
        engage in securities lending. Securities           the Fund of complying with various new
        lending involves the risk that the Fund            or existing regulatory requirements. This
        may lose money because the borrower                risk may be heightened during times of
        of the loaned securities fails to return           increased market volatility or other
        the securities in a timely manner or at            unusual market conditions. Tracking
        all. The Fund could also lose money in             error also may result because the Fund
        the event of a decline in the value of             incurs fees and expenses, while the
        collateral provided for loaned securities          Underlying Index does not.
        or a decline in the value of any                   U.S. Agency Debt Risk. The Fund
        investments made with cash collateral.             invests in unsecured bonds or
        These events could also trigger adverse            debentures issued or guaranteed by the
        tax consequences for the Fund.                     U.S. government or one of its agencies
        Security Risk. Some countries and                  or sponsored entities. Certain debt
        regions in which the Fund invests have             issuances by U.S. government agencies
        experienced security concerns, such as             or sponsored entities, including, among
        terrorism and strained international               others, the Federal National Mortgage
        relations. Incidents involving a country’s         Association (“Fannie Mae”) the Federal
                                                           Home Loan Mortgage Corporation

                                                     S-8
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        (“Freddie Mac”), the Federal Home Loan             would expose the Fund to possible
        Banks (“FHLB”), and the Tennessee                  losses.
        Valley Authority (“TVA”), are backed only          U.S. Treasury Obligations Risk. U.S.
        by the general creditworthiness and                Treasury obligations may differ from
        reputation of the U.S. government                  other securities in their interest rates,
        agency or sponsored entity and not the             maturities, times of issuance and other
        full faith and credit of the U.S.                  characteristics and may provide
        government and, as a result, are subject           relatively lower returns than those of
        to additional credit risk. To the extent           other securities. Similar to other
        that the U.S. government has provided              issuers, changes to the financial
        support to a U.S. agency or sponsored              condition or credit rating of the U.S.
        entity in the past, there can be no                government may cause the value of the
        assurance that the U.S. government will            Fund’s U.S. Treasury obligations to
        provide support in the future if it is not         decline.
        obligated to do so. Government
        National Mortgage Association (“Ginnie             Valuation Risk. The price the Fund
        Mae”) securities and certain foreign               could receive upon the sale of a security
        government debt issuances guaranteed               or other asset may differ from the
        by the U.S. government are backed by               Fund’s valuation of the security or other
        the full faith and credit of the U.S.              asset and from the value used by the
        government.                                        Underlying Index, particularly for
                                                           securities or other assets that trade in
        U.S. Agency Mortgage-Backed                        low volume or volatile markets or that
        Securities Risk. The Fund invests in               are valued using a fair value
        MBS issued or guaranteed by the U.S.               methodology as a result of trade
        government or one of its agencies or               suspensions or for other reasons. In
        sponsored entities, some of which may              addition, the value of the securities or
        not be backed by the full faith and credit         other assets in the Fund’s portfolio may
        of the U.S. government. MBS represent              change on days or during time periods
        interests in “pools” of mortgages and              when shareholders will not be able to
        are subject to interest rate,                      purchase or sell the Fund’s shares.
        prepayment, and extension risk. MBS                Authorized Participants who purchase or
        react differently to changes in interest           redeem Fund shares on days when the
        rates than other bonds, and the prices             Fund is holding fair-valued securities
        of MBS may reflect adverse economic                may receive fewer or more shares, or
        and market conditions. Small                       lower or higher redemption proceeds,
        movements in interest rates (both                  than they would have received had the
        increases and decreases) may quickly               Fund not fair-valued securities or used a
        and significantly reduce the value of              different valuation methodology. The
        certain MBS. MBS are also subject to               Fund’s ability to value investments may
        the risk of default on the underlying              be impacted by technological issues or
        mortgage loans, particularly during                errors by pricing services or other third-
        periods of economic downturn. Default              party service providers.
        or bankruptcy of a counterparty to a
        to-be-announced (“TBA”) transaction

                                                     S-9
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        Performance Information
        The bar chart and table that follow show how the Fund has performed on a calendar
        year basis and provide an indication of the risks of investing in the Fund. Both assume
        that all dividends and distributions have been reinvested in the Fund. Past performance
        (before and after taxes) does not necessarily indicate how the Fund will perform in the
        future. If BFA had not waived certain Fund fees during certain periods, the Fund’s
        returns would have been lower.
                              Year by Year Returns1 (Years Ended December 31)

                          12%
                                                                    8.82%
                           9%
                                                                                   6.37%
                           6%
                                       3.89%
                           3%
                                                      0.07%
                           0%

                                       2017           2018          2019           2020

          1
              The Fund’s year-to-date return as of March 31, 2021 was -2.36%
        The best calendar quarter return during the periods shown above was 3.42% in the 1st
        quarter of 2019; the worst was -1.57% in the 1st quarter of 2018.
        Updated performance information, including the Fund’s current NAV, may be obtained
        by visiting our website at www.iShares.com or by calling 1-800-iShares (1-800-474-
        2737) (toll free).
                                         Average Annual Total Returns
                                  (for the periods ended December 31, 2020)
                                                                                                    Since Fund
                                                                                       One Year      Inception
        (Inception Date: 11/1/2016)
           Return Before Taxes                                                             6.37%       4.01%
           Return After Taxes on Distributions2                                            5.23%       2.80%
           Return After Taxes on Distributions and Sale of Fund Shares2                    3.76%       2.53%
        Bloomberg Barclays U.S. Universal 5-10 Year Index (Index returns
        do not reflect deductions for fees, expenses, or taxes)                            6.60%       4.12%

               2
                   After-tax returns in the table above are calculated using the historical highest individual
                   U.S. federal marginal income tax rates and do not reflect the impact of state or local taxes.
                   Actual after-tax returns depend on an investor’s tax situation and may differ from those
                   shown, and after-tax returns shown are not relevant to tax-exempt investors or investors
                   who hold shares through tax-deferred arrangements, such as 401(k) plans or individual
                   retirement accounts (“IRAs”). Fund returns after taxes on distributions and sales of Fund
                   shares are calculated assuming that an investor has sufficient capital gains of the same
                   character from other investments to offset any capital losses from the sale of Fund shares.
                   As a result, Fund returns after taxes on distributions and sales of Fund shares may exceed
                   Fund returns before taxes and/or returns after taxes on distributions.

                                                           S-10
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        Management                                        Tax Information
        Investment Adviser. BlackRock Fund                The Fund intends to make distributions
        Advisors.                                         that may be taxable to you as ordinary
        Portfolio Managers. James Mauro and               income or capital gains, unless you are
        Karen Uyehara (the “Portfolio                     investing through a tax-deferred
        Managers”) are primarily responsible for          arrangement such as a 401(k) plan or
        the day-to-day management of the                  an IRA, in which case, your distributions
        Fund. Each Portfolio Manager                      generally will be taxed when withdrawn.
        supervises a portfolio management                 Payments to Broker-Dealers
        team. Mr. Mauro and Ms. Uyehara have
        been Portfolio Managers of the Fund
                                                          and Other Financial
        since 2016 and 2021, respectively.                Intermediaries
                                                          If you purchase shares of the Fund
        Purchase and Sale of Fund                         through a broker-dealer or other
        Shares                                            financial intermediary (such as a bank),
        The Fund is an exchange-traded fund               BFA or other related companies may
        (commonly referred to as an “ETF”).               pay the intermediary for marketing
        Individual shares of the Fund may only            activities and presentations, educational
        be bought and sold in the secondary               training programs, conferences, the
        market through a broker-dealer.                   development of technology platforms
        Because ETF shares trade at market                and reporting systems or other services
        prices rather than at NAV, shares may             related to the sale or promotion of the
        trade at a price greater than NAV (a              Fund. These payments may create a
        premium) or less than NAV (a discount).           conflict of interest by influencing the
        An investor may incur costs attributable          broker-dealer or other intermediary and
        to the difference between the highest             your salesperson to recommend the
        price a buyer is willing to pay to                Fund over another investment. Ask your
        purchase shares of the Fund (bid) and             salesperson or visit your financial
        the lowest price a seller is willing to           intermediary’s website for more
        accept for shares of the Fund (ask)               information.
        when buying or selling shares in the
        secondary market (the “bid-ask
        spread”).

                                                   S-11
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        More Information About the Fund
        This Prospectus contains important information about investing in the Fund. Please
        read this Prospectus carefully before you make any investment decisions. Additional
        information regarding the Fund is available at www.iShares.com.
        BFA is the investment adviser to the Fund. Shares of the Fund are listed for trading on
        NYSE Arca, Inc. (“NYSE Arca”). The market price for a share of the Fund may be
        different from the Fund’s most recent NAV.
        ETFs are funds that trade like other publicly-traded securities. The Fund is designed to
        track an index. Similar to shares of an index mutual fund, each share of the Fund
        represents an ownership interest in an underlying portfolio of securities and other
        instruments intended to track a market index. Unlike shares of a mutual fund, which
        can be bought and redeemed from the issuing fund by all shareholders at a price based
        on NAV, shares of the Fund may be purchased or redeemed directly from the Fund at
        NAV solely by Authorized Participants and only in aggregations of a specified number of
        shares (“Creation Units”). Also unlike shares of a mutual fund, shares of the Fund are
        listed on a national securities exchange and trade in the secondary market at market
        prices that change throughout the day.
        The Fund invests in a particular segment of the securities markets and seeks to track
        the performance of a securities index that is not representative of the market as a
        whole. The Fund is designed to be used as part of broader asset allocation strategies.
        Accordingly, an investment in the Fund should not constitute a complete investment
        program.
        An index is a financial calculation, based on a grouping of financial instruments, and is
        not an investment product, while the Fund is an actual investment portfolio. The
        performance of the Fund and the Underlying Index may vary for a number of reasons,
        including transaction costs, non-U.S. currency valuations, asset valuations, corporate
        actions (such as mergers and spin-offs), timing variances and differences between the
        Fund’s portfolio and the Underlying Index resulting from the Fund’s use of
        representative sampling or from legal restrictions (such as diversification
        requirements) that apply to the Fund but not to the Underlying Index. From time to
        time, the Index Provider may make changes to the methodology or other adjustments
        to the Underlying Index. Unless otherwise determined by BFA, any such change or
        adjustment will be reflected in the calculation of the Underlying Index performance on
        a going-forward basis after the effective date of such change or adjustment. Therefore,
        the Underlying Index performance shown for periods prior to the effective date of any
        such change or adjustment will generally not be recalculated or restated to reflect
        such change or adjustment.
        “Tracking error” is the divergence of the Fund’s performance from that of the
        Underlying Index. Because the Fund uses a representative sampling indexing strategy,
        it can be expected to have a larger tracking error than if it used a replication indexing
        strategy. “Replication” is an indexing strategy in which a fund invests in substantially all

                                                     1
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        of the securities in its underlying index in approximately the same proportions as in the
        underlying index.
        An investment in the Fund is not a bank deposit and it is not insured or guaranteed by
        the Federal Deposit Insurance Corporation or any other government agency, BFA or
        any of its affiliates.
        The Fund’s investment objective and the Underlying Index may be changed without
        shareholder approval.

        A Further Discussion of Principal Risks
        The Fund is subject to various risks, including the principal risks noted below, any of
        which may adversely affect the Fund’s NAV, trading price, yield, total return and ability
        to meet its investment objective. You could lose all or part of your investment in the
        Fund, and the Fund could underperform other investments. The order of the below risk
        factors does not indicate the significance of any particular risk factor.
        Asset Class Risk. The securities and other assets in the Underlying Index or in the
        Fund’s portfolio may underperform in comparison to other securities or indexes that
        track other countries, groups of countries, regions, industries, groups of industries,
        markets, market segments, asset classes or sectors. Various types of securities,
        currencies and indexes may experience cycles of outperformance and
        underperformance in comparison to the general financial markets depending upon a
        number of factors including, among other things, inflation, interest rates, productivity,
        global demand for local products or resources, and regulation and governmental
        controls. This may cause the Fund to underperform other investment vehicles that
        invest in different asset classes.
        Authorized Participant Concentration Risk. Only an Authorized Participant may
        engage in creation or redemption transactions directly with the Fund, and none of
        those Authorized Participants is obligated to engage in creation and/or redemption
        transactions. The Fund has a limited number of institutions that may act as Authorized
        Participants on an agency basis (i.e., on behalf of other market participants). To the
        extent that Authorized Participants exit the business or are unable to proceed with
        creation or redemption orders with respect to the Fund and no other Authorized
        Participant is able to step forward to create or redeem Creation Units, Fund shares
        may be more likely to trade at a premium or discount to NAV and possibly face trading
        halts or delisting. Authorized Participant concentration risk may be heightened
        because ETFs, such as the Fund, that invest in securities issued by non-U.S. issuers or
        other securities or instruments that are less widely traded often involve greater
        settlement and operational issues and capital costs for Authorized Participants, which
        may limit the availability of Authorized Participants.
        Call Risk. During periods of falling interest rates, an issuer of a callable bond held by
        the Fund may “call” or repay the security before its stated maturity, and the Fund may
        have to reinvest the proceeds in securities with lower yields, which would result in a
        decline in the Fund’s income, or in securities with greater risks or with other less
        favorable features.

                                                    2
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        Concentration Risk. The Fund may be susceptible to an increased risk of loss,
        including losses due to adverse events that affect the Fund’s investments more than
        the market as a whole, to the extent that the Fund’s investments are concentrated in
        the securities and/or other assets of a particular sovereign or quasi-sovereign entity or
        entities, country, group of countries, region, market, industry, group of industries,
        sector, market segment or asset class. The Fund may be more adversely affected by
        the underperformance of those securities and/or other assets, may experience
        increased price volatility and may be more susceptible to adverse economic, market,
        political or regulatory occurrences affecting those securities and/or other assets than
        a fund that does not concentrate its investments.
        Credit Risk. Credit risk is the risk that the issuer or guarantor of a debt instrument or
        the counterparty to a derivatives contract, repurchase agreement or loan of portfolio
        securities will be unable or unwilling to make its timely interest and/or principal
        payments when due or otherwise honor its obligations. There are varying degrees of
        credit risk, depending on an issuer’s or counterparty’s financial condition and on the
        terms of an obligation, which may be reflected in the issuer’s or counterparty’s credit
        rating. There is the chance that the Fund’s portfolio holdings will have their credit
        ratings downgraded or will default (i.e., fail to make scheduled interest or principal
        payments), or that the market’s perception of an issuer’s creditworthiness may
        worsen, potentially reducing the Fund’s income level or share price.
        Cybersecurity Risk. With the increased use of technologies such as the internet to
        conduct business, the Fund, Authorized Participants, service providers and the relevant
        listing exchange are susceptible to operational, information security and related
        “cyber” risks both directly and through their service providers. Similar types of
        cybersecurity risks are also present for issuers of securities in which the Fund invests,
        which could result in material adverse consequences for such issuers and may cause
        the Fund’s investment in such issuers to lose value. Unlike many other types of risks
        faced by the Fund, these risks typically are not covered by insurance. In general, cyber
        incidents can result from deliberate attacks or unintentional events. Cyber incidents
        include, but are not limited to, gaining unauthorized access to digital systems (e.g.,
        through “hacking” or malicious software coding) for purposes of misappropriating
        assets or sensitive information, corrupting data, or causing operational disruption.
        Cyberattacks may also be carried out in a manner that does not require gaining
        unauthorized access, such as causing denial-of-service attacks on websites (i.e.,
        efforts to make network services unavailable to intended users). Recently, geopolitical
        tensions may have increased the scale and sophistication of deliberate attacks,
        particularly those from nation-states or from entities with nation-state backing.
        Cybersecurity failures by, or breaches of, the systems of the Fund’s adviser, distributor
        and other service providers (including, but not limited to, index and benchmark
        providers, fund accountants, custodians, transfer agents and administrators), market
        makers, Authorized Participants or the issuers of securities in which the Fund invests,
        have the ability to cause disruptions and impact business operations, potentially
        resulting in: financial losses, interference with the Fund’s ability to calculate its NAV,
        disclosure of confidential trading information, impediments to trading, submission of
        erroneous trades or erroneous creation or redemption orders, the inability of the Fund
        or its service providers to transact business, violations of applicable privacy and other

                                                    3
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        laws, regulatory fines, penalties, reputational damage, reimbursement or other
        compensation costs, or additional compliance costs. In addition, cyberattacks may
        render records of Fund assets and transactions, shareholder ownership of Fund shares,
        and other data integral to the functioning of the Fund inaccessible or inaccurate or
        incomplete. Substantial costs may be incurred by the Fund in order to resolve or
        prevent cyber incidents in the future. While the Fund has established business
        continuity plans in the event of, and risk management systems to prevent, such cyber
        incidents, there are inherent limitations in such plans and systems, including the
        possibility that certain risks have not been identified and that prevention and
        remediation efforts will not be successful or that cyberattacks will go undetected.
        Furthermore, the Fund cannot control the cybersecurity plans and systems put in place
        by service providers to the Fund, issuers in which the Fund invests, the Index Provider,
        market makers or Authorized Participants. The Fund and its shareholders could be
        negatively impacted as a result.
        Extension Risk. During periods of rising interest rates, certain debt obligations may
        be paid off substantially more slowly than originally anticipated and the value of those
        securities may fall sharply, resulting in a decline in the Fund’s income and potentially in
        the value of the Fund’s investments.
        Geographic Risk. Some of the companies in which the Fund invests are located in
        parts of the world that have historically been prone to natural disasters, such as
        earthquakes, tornadoes, volcanic eruptions, droughts, floods, hurricanes or tsunamis,
        and are economically sensitive to environmental events. Any such event may adversely
        impact the economies of these geographic areas or business operations of companies
        in these geographic areas, causing an adverse impact on the value of the Fund.
        High Portfolio Turnover Risk. High portfolio turnover (considered by the Fund to
        mean higher than 100% annually) may result in increased transaction costs to the
        Fund, including brokerage commissions, dealer mark-ups and other transaction costs
        on the sale of the securities and on reinvestment in other securities. These effects of
        higher than normal portfolio turnover may adversely affect Fund performance.
        High Yield Securities Risk. Securities that are rated below investment-grade
        (commonly referred to as “junk bonds,” which may include those bonds rated below
        “BBB-” by S&P Global Ratings and Fitch, or below “Baa3” by Moody’s), or are unrated,
        may be deemed speculative, may involve greater levels of risk than higher-rated
        securities of similar maturity and may be more likely to default.
        The major risks of high yield securities investments include:
        䡲   High yield securities may be issued by less creditworthy issuers. Issuers of high yield
            securities may have a larger amount of outstanding debt relative to their assets than
            issuers of investment-grade bonds. In the event of an issuer’s bankruptcy, claims of
            other creditors may have priority over the claims of high yield securities holders,
            leaving few or no assets available to repay high yield securities holders.
        䡲   Prices of high yield securities are subject to extreme price fluctuations. Adverse
            changes in an issuer’s industry and general economic conditions may have a greater
            impact on the prices of high yield securities than on other higher rated fixed-income
            securities. The credit rating of a high yield security does not necessarily address its

                                                     4
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