So basically on the ISA account, if I have invested £4K, but £0.5K are in a particular company who has done very well and is now worth 2.5k. If I close this position my account is worth 6k (4k initial, 2k gains) assuming 0 gains on the remaining 3.5k
If i was to reinvest the 2k, would the “Invested” number change? technically I did not deposit more than 4k into my account, so why are profits that are being reinvested bringing up my invested amount?