Funds market price

The ETF market price is the price at which shares in the ETF can be bought or sold on the exchanges during trading hours. The net asset value (NAV) of an ETF represents the value of each share's portion of the fund's underlying assets and cash at the end of the trading day.

I suggest adding a market price for a fund. It can work like this - 
When creating a fund, it's market price is 100

Then when an investor looks at the fund, he can see if the fund is 120 it already went up 20%.
This has multiple advantages - 

1. Following when I entered and when I leave a fund according to 1 value.

2. For taxes, this could be a good way to treat a fund as an asset instead of many inside trades. Like for ETFs.