T-Bill Yields 2009. The interest yields on U.S. Treasury securities in early 2009 fell to very low levels as a result of the combined events surrounding the global financial crisis. Calculate the simple and annualized yields for the 3-month and 6 -month Tresury bills auctioned on March 9, 2009, listed here. The simple yield for the 3-month Treasury bills is \%. (Round to four decimal places.) The simple yield for the 6-month Treasury bills is \%. (Round to four decimal places.) The annualized yield for the 3-month Treasury bills is \%. (Round to four decimal places.) The annualized yield for the 6-month Treasury bills is \%. (Round to four decimal places.)