The iShares 0-3 Month Treasury Bond ETF (SGOV) is an ETF that seeks to track an index that includes U.S. Treasury bills with maturities of 0–3 months. Thus it holds investments what effectively become cash in 90 days.
Net Assets of Fund = $99,949,124,843 ($99 Billion).

Courtesy of Blackrock

Courtesy of Blackrock

Courtesy of Blackrock