Source: FDIC and Federal Reserve data via the Federal Reserve Bank of St. Louis, and the U.S. Treasury; monthly observations. Data through Money market account, weekly series through 2021: 2021-03-29; Money market account, monthly series from 2021: 2026-09-01; Fed overnight reverse repo award rate: 2026-10-16; Treasury bill, 1-month: 2026-10-16.