iShares Yield Optimized Bond ETF (iShares Yield Optimized Bond ET) ETF

The fund will invest at least 80% of its assets in the component securities of the underlying index and to-be-announced transactions (“TBAs”) that have economic characteristics that are substantially identical to the economic characteristics of the component securities of the underlying index. The underlying index is a broadly diversified fixed-income index that seeks to deliver current income while maintaining long-term capital appreciation.