Like short-term CDs, the yields of 4-week T-Bills are also declining prior to next week’s Fed meeting. As listed in Kirkland’s “Highest Brokered CD Rates As Of 9/11/2024” post, 5.381% was the investment rate of the 4-week T-Bill from the Treasury auction 5 weeks ago (8/8/2024). 5.053% is the investment rate of the 4-week T-Bill from today’s Treasury auction.
https://www.treasurydirect.gov/instit/annceresult/press/preanre/2024/R_20240912_2.pdf