ZCYC Help   CCIL Rupee Yield Curve (Zero Coupon Yield Curve) HELP   To be able to use the file for portfolio valuation, the software settings in Excel would need to be as under: a) Macro Security should be set to low (available under Tools/Macro/Security) b) Analysis Toolpak & Analysis Toolpak – VBA should be selected (available under Tools/Add-Ins)