iShares iBonds Dec 2023 Term Treasury 

The fund will invest at least 80% of its assets in the component securities of the underlying index, and it will invest at least 90% of its assets in U.S. Treasury securities that BFA believes will help the fund track the underlying index. The underlying index consists of publicly-issued U.S. Treasury securities that are scheduled to mature between January 1, 2023 and December 15, 2023, inclusive. It is non-diversified.