Determining the present value of an fCash asset requires an interest rate to the fCash asset's maturity. But by definition, idiosyncratic fCash assets do not correspond to a maturity within the rate oracle set, so interest rates for idiosyncratic fCash assets are not immediately available. We solve this problem by drawing a fCash valuation curve that is linearly interpolated from our available rate oracles and then picking interest rates from that curve at any idiosyncratic maturity.