BTC iShares International Aggregate Bond Fund (IAGG) Exchange: BATS

The Fund seeks to track the investment results of the Bloomberg Barclays Global Aggregate ex USD 10% Issuer Capped (Hedged) Index (the “Underlying Index”), which measures the performance of the global investment-grade (as determined by Bloomberg Index Services Limited (the “Index Provider” or “Bloomberg”)) bond market. As of October 31, 2019, there were 10,978 issues in the Underlying Index. The Underlying Index includes investment-grade fixed-rate sovereign and government-related debt, corporate and securitized bonds from both developed and emerging market issuers. Securities included in the Underlying Index are issued in currencies other than the U.S. dollar, must have maturities of at least one year and are required to meet minimum outstanding issue size criteria. The Underlying Index is market capitalization-weighted with a cap on each issuer of 10%. Debt that is publicly issued in the global and regional markets is included in the Underlying Index. Certain types of securities, such as USD-denominated bonds, contingent capital securities, inflation-linked bonds, floating-rate issues, fixed-rate perpetuals, retail bonds, structured notes, pass-through certificates, private placements (other than those offered pursuant to Rule 144A or Regulation S promulgated under the Securities Act of 1933, as amended (the “1933 Act”)), sinkable Russian OFZ bonds issued prior to 2009 and securities where reliable pricing is unavailable are excluded from the Underlying Index. The securities in the Underlying Index are updated on the last business day of each month, and the currency risk of the securities in the Underlying Index are hedged to the U.S. dollar on a monthly basis. As of October 31, 2019, a significant portion of the Underlying Index is represented by non-U.S. government-related bonds and non-U.S. corporate bonds. The components of the Underlying Index are likely to change over time.The Underlying Index was comprised of securities issued by governments in 59 countries or regions as well as securities issued or guaranteed by supranational entities as of October 31, 2019.BFA uses a “passive” or indexing approach to try to achieve the Fund’s investment objective. Unlike many investment companies, the Fund does not try to “beat” the index it tracks and does not seek temporary defensive positions when markets decline or appear overvalued.Indexing may eliminate the chance that the Fund will substantially outperform the Underlying Index but also may reduce some of the risks of active management, such as poor security selection. Indexing seeks to achieve lower costs and better after-tax performance by aiming to keep portfolio turnover low in comparison to actively managed investment companies.BFA uses a representative sampling indexing strategy to manage the Fund. “Representative sampling” is an indexing strategy that involves investing in a representative sample of securities or other instruments comprising an applicable underlying index. The securities selected are expected to have, in the aggregate, investment characteristics (based on factors such as market value and industry weightings), fundamental characteristics (such as return variability, duration, maturity, credit ratings and yield) and liquidity measures similar to those of an applicable underlying index. The Fund may or may not hold all of the securities and other components of the Underlying Index.The Fund generally will invest at least 90% of its assets in the component securities and other instruments of the Underlying Index and may invest up to 10% of its assets in certain futures, options and swap contracts, cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates (“BlackRock Cash Funds”), as well as in securities not included in the Underlying Index, but which BFA believes will help the Fund track the Underlying Index. From time to time when conditions warrant, however, the Fund may invest at least 80% of its assets in the component securities and other instruments of the Underlying Index and may invest up to 20% of its assets in certain futures, options and swap contracts, cash and cash equivalents, including shares of BlackRock Cash Funds, as well as in securities not included in the Underlying Index, but which BFA believes will help the Fund track the Underlying Index.Components of the Underlying Index include fixed-income securities and foreign currency forward contracts (both deliverable and non-deliverable) designed to hedge non-U.S. currency fluctuations against the U.S. dollar. The notional exposure to foreign currency forward contracts (both deliverable and non-deliverable) generally will be a short position that hedges the currency risk of the fixed-income portfolio. The Fund seeks to track the investment results of the Underlying Index before fees and expenses of the Fund.The Underlying Index sells forward the total value of the underlying non-U.S. dollar currencies at a one-month forward rate to hedge against fluctuations in the relative value of the non-U.S. dollar component currencies in relation to the U.S. dollar. The hedge is reset on a monthly basis. The Underlying Index is designed to have higher returns than an equivalent unhedged investment when the non-U.S. dollar component currencies are weakening relative to the U.S. dollar and appreciation in some of the non-U.S. dollar component currencies does not exceed the aggregate depreciation of the others. Conversely, the Underlying Index is designed to have lower returns than an equivalent unhedged investment when the non-U.S. dollar component currencies, on a net basis, are rising relative to the U.S. dollar.In order to track the “hedging” component of the Underlying Index, the Fund enters into foreign currency forward contracts designed to offset the Fund’s exposure to the non-U.S. dollar component currencies. A foreign currency forward contract is a contract between two parties to buy or sell a specified amount of a specific currency in the future at an agreed-upon exchange rate. The Fund's exposure to foreign currency forward contracts is based on the aggregate exposure of the Fund to the non-U.S. dollar component currencies. While this approach is designed to minimize the impact of currency fluctuations on Fund returns, it does not necessarily eliminate the Fund’s exposure to the non-U.S. dollar component currencies. The return of the foreign currency forward contracts may not perfectly offset the actual fluctuations in value between the non-U.S. dollar component currencies and the U.S. dollar.The Fund may also use non-deliverable forward (“NDF”) contracts to execute its hedging transactions. An NDF is a contract where there is no physical settlement of two currencies at maturity. Rather, based on the movement of the currencies and the contractually agreed upon exchange rate, a net cash settlement will be made by one party to the other in U.S. dollars.The Underlying Index is sponsored by Bloomberg, which is independent of the Fund and BFA. The Index Provider determines the composition and relative weightings of the securities in the Underlying Index and publishes information regarding the market value of the Underlying Index.Industry Concentration Policy. The Fund will concentrate its investments (i.e., hold 25% or more of its total assets) in a particular industry or group of industries to approximately the same extent that the Underlying Index is concentrated. For purposes of this limitation, securities of the U.S. government (including its agencies and instrumentalities), repurchase agreements collateralized by U.S. government securities, and securities of state or municipal governments and their political subdivisions are not considered to be issued by members of any industry.