BUILD A STRONG FOUNDATION WITH iSHARES CORE ETFS

^* Net expense ratio shown for AGG reflects contractual fee waiver in place until 6/30/26. Gross expense ratio is 0.06%.

¹ BlackRock and Morningstar, as of 12/31/17. Comparison is between the average Prospectus Net Expense Ratio for the iShares Core Series ETFs (0.10%) and the average Prospectus Net Expense Ratio of active open-end mutual funds (1.14%) available in the U.S. on 12/31/17.

² Blackrock, as of 12/31/17. Based on 830 ETFs and $1.75 trillion in assets under management globally.

³ ETFs are subject to a short-term trading fee by Fidelity, if held less than 30 days. Other conditions and fees may apply. BlackRock is not affiliate with Fidelity or any of their affiliates.

Carefully consider the Funds' investment objectives, risk factors, and charges and expenses before investing. This and other information can be found in the Funds' prospectuses or, if available, the summary prospectuses, which may be obtained by visiting the iShares Fund and BlackRock Fund prospectus pages. Read the prospectus carefully before investing.

Investing involves risk, including possible loss of principal.

Transactions in shares of ETFs will result in brokerage commissions and will generate tax consequences. All regulated investment companies are obliged to distribute portfolio gains to shareholders.

Diversification and asset allocation may not protect against market risk or loss of principal.

The strategies discussed are strictly for illustrative and educational purposes and are not a recommendation, offer or solicitation to buy or sell any securities or to adopt any investment strategy. There is no guarantee that any strategies discussed will be effective.

The tool is provided on an "as-is" basis. BlackRock expressly disclaims all warranties, express or implied, statutory or otherwise with respect to the tool (and any results obtained from its use) including, without limitation, all warranties or merchantability, fitness for a particular purpose or use, accuracy, completeness, originality and/or non-infringement. In no event shall BlackRock have any liability for any claims, damages, obligations, liabilities or losses relating to the tool including, without limitation, any liability for any direct, indirect, special, incidental, punitive and/or consequential damages (including loss of profits or principal).

The Funds are distributed by BlackRock Investments, LLC (together with its affiliates, "BlackRock").

The iShares Funds are not sponsored, endorsed, issued, sold or promoted by Barclays, Bloomberg Finance L.P., BlackRock Index Services, LLC, Cohen & Steers Capital Management, Inc., European Public Real Estate Association (“EPRA® ”), FTSE International Limited (“FTSE”), ICE Data Services, LLC, India Index Services & Products Limited, JPMorgan Chase & Co., Japan Exchange Group, MSCI Inc., Markit Indices Limited, Morningstar, Inc., The NASDAQ OMX Group, Inc., National Association of Real Estate Investment Trusts (“NAREIT”), New York Stock Exchange, Inc., Russell or S&P Dow Jones Indices LLC. None of these companies make any representation regarding the advisability of investing in the Funds. With the exception of BlackRock Index Services, LLC, who is an affiliate, BlackRock Investments, LLC is not affiliated with the companies listed above.

Neither FTSE nor NAREIT makes any warranty regarding the FTSE NAREIT Equity REITS Index, FTSE NAREIT All Residential Capped Index or FTSE NAREIT All Mortgage Capped Index; all rights vest in NAREIT. Neither FTSE nor NAREIT makes any warranty regarding the FTSE EPRA/NAREIT Developed Real Estate ex-U.S. Index, FTSE EPRA/NAREIT Developed Europe Index or FTSE EPRA/NAREIT Global REIT Index; all rights vest in FTSE, NAREIT and EPRA.“FTSE®” is a trademark of London Stock Exchange Group companies and is used by FTSE under license.

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