What is TBILLEQ function in Excel? TBILLEQ function is one of Financial functions in Microsoft Excel that returns the bond-equivalent yield for a Treasury bill. Syntax of TBILLEQ function TBILLEQ(settlement, maturity, discount) 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 day of May, 2008. Problems…