Hi Mark,
The YTD ROI (1/1/19-5/31/19)for portfolio seems to be heavily (overly)skewed by a few investments that either started in March and are still owned or start in March and sold a few weeks later. I have tried all setting of interpolation. Whilst ROI of these two investments in portfolio show as NA in report, they have major affect on overall portfolio ROI in report. I can tell because if I remove these two investments from portfolio I get a reasonable portfolio ROI.
Thanks//Cliff