Have always been able to see ROI (or TWR) yields on the Portfolio Gain graph for the periods I specify. Now I am getting nothing but N.A. (FM Version 2018)
Have monkeyed around with Yield Interpolation Range to no avail. And, anyway, had not touched that.
This may have come about when I had to reinstall FM and opened a .FMB file rather than restoring it.
Thank you sirs.