What is TBILLYIELD function in Excel? TBILLYIELD function is one of the Financial functions in Microsoft Excel that returns the yield for a Treasury bill. Syntax of TBILLYIELD function TBILLYIELD(settlement, maturity, pr) Important: Dates should be entered by using the DATE function, or as results of other formulas or functions. For example, use DATE(2008,5,23) for the 23rd […]