Percentage change in Token value of when investments are started and Finished

since investor funds come back as GVT tokens and aer based on the current exchange rate, it would make sense to show thep/l in percentage terms of the GVT itself for the period invested.

Therefore  the investor can understand why they received the number of tokens back

Notes:  this has nothing to do with the managers P/L but solely the GVT token value of when the investor invests and when the investment ends.