What are select time period Daily Treasury bill rates?

Select Time Period Daily Treasury Bill Rates: These rates are the daily secondary market quotations on the most recently auctioned Treasury Bills for each maturity tranche (4-week, 8-week, 13-week, 17-week, 26-week, and 52-week) for which Treasury currently issues new bills.

When did Treasury stop publishing the 30-year constant maturity series?

View the Daily Treasury Bill Rates Treasury ceased publication of the 30-year constant maturity series on February 18, 2002 and resumed that series on February 9, 2006.

How long is a T-Bill a year?

13-week (3-month) T-Bill - Term of 91-92 days; auctioned weekly on Monday at 11:30. 17-week (4-month) T-Bill - Auctioned weekly on Wednesday. First issued in October 2022. 26-week (6-month) T-Bill - Term of 181-182 days; auctioned weekly on Monday at 11:30. 52-week (1-year) T-Bill - Term of 365 days; auctioned monthly on a Tuesday at 1:00.