SHV delivers ultra-short term U.S. debt securities in an efficient and accessible basket. The fund holds bonds with maturities of 12 months or less. SHV tracks a broad, vanilla index, and represents the ultra-short term U.S. securities market very well. On May 1, 2020 the fund began tracking the ICE Short US Treasury Securities Index. Between July 1, 2016 and April 30, 2020 SHV tracked the ICE U.S. Treasury Short Bond Index. The changes do not appear to have a material impact on exposure or performance relative to the Barclays U.S. Short Treasury Bond Index it originally tracked.