iShares iBoxx $ High Yield Corporate Bond ETF (the Fund), formerly iShares iBoxx $ High Yield Corporate Bond Fund, is an exchange-traded fund (ETF). The Fund seeks to track the investment results of the Markit iBoxx USD Liquid High Yield Index (the Index), which is a rules-based index consisting of liquid the United States dollar-denominated, high yield corporate bonds for sale in the United States, as determined by the index provider. The Index may include large-, mid- or small-capitalization companies, and components primarily include consumer services, financial, industrials, and oil and gas companies. The components of the Index, and the degree to which these components represent certain industries. The Fund generally invests at least 90% of its assets in the securities of the Index and in investments that provide substantially similar exposure to the securities in the Index. The Fund�s investment adviser is BlackRock Fund Advisors.