I don’t see anything higher than 5.34% on Tbills:
https://treasurydirect.gov/auctions/announcements-data-results/
From my Schwab account.
Not an auction.
CUSIP 912797GZ4
Security Type U.S. Treasuries
Maturity Date 04/04/2024
Coupon Rate 0.000%
Coupon Type Fixed
Coupon Frequency —
Accrual Day Count Act/360
Dated Date 10/05/2023
First Settlement Date 10/05/2023
First Coupon Date —
Next Coupon Date —
Original Issue Discount 97.300333
DTC Eligible Yes
Evaluated Price 97.300333
Call / Put / Sink Features
Call Type —
Call Method —
Call Details No Cash Call Identified
Call Notification Days —
Next Call Price —
Next Call Date —
Call Schedule —
Survivor’s Option No
Quote Details Bid Ask
Price 97.299 97.304
Current Yield 0.000% 0.000%
Yield To Maturity 5.582% 5.572%
Yield To Call — —
Yield To Worst — —
Available Quantity 5000 15000
Trade Min/Increment 1 / 1 1 / 1
Security Min/Increment 1 / 1 1 / 1
Price Details Price based on 25 bonds and a settlement date of 10/05/2023
Of course that should be 5.57.
Oops