Implied Yield

Function Implied Yield within Fxd Rate Bond Fwd with keys Fxd Rate Bond Fwd Implied Yield keysperforms a simple yield calculation based on underlying spot and forward values, taking into account underlying income.
When t > 0, call with Underlying Spot Value = spotValue(t) and Underlying Forward Value = strike, to get current yield.
Here spotValue(t) is the output of the function Spot Value for a given settlement date t
For a repo, if t = 0, it should reproduce the spot repo rate.