Extract for each week, the yield of the 26-week Treasurybill (or equivalently the 90 day or 180-day bank accepted bill from the financial media (i.e. FederalReserve Bank: http://www.federalreserve.gov/default.htm)over your sample period. (Remember sometimes reported yields are usually annualised figures. Convert the yields to weekly numbers. Use these as a proxy for the risk free rate).The treasuey bill that i needed is from 2015~2016 most recent rate. Please help me to fine those data asap.