Which funds can replace UPPXX?

Which mutual funds can replace UPPXX?

Which mutual funds can replace UPPXX? ranked by return similarity
RankTickerFundReturn similarity
1UPRXXUBS Prime Reserves Fund99.8%
2STPXXUBS Select Treasury Preferred Fund99.7%
3SEGXXUBS Select Government Institutional Fund99.7%
4SOPXXUBS Select 100% US Treasury Preferred Fund Class T99.4%
5SIOXXUBS Select 100% US Treasury Institutional Fund - Institutional Shares99.4%
6RMGXXUBS RMA Government Money Market Fund98.7%
7SETXXUBS Select Treasury Institutional Fund97.3%