It seems that my book cost fluctuates. In order to calculate running P/L of the portfolio, the book cost should be fixed in the account native currency on time of purchase?
Why is it changing? Is it because at the time when I bough US shares the GBP/USD was different?
Also what does it mean when the book cost goes down in that scenario? Is it because NOW the GBP/USD is higher in value?
I guess book cost going down than what I actually aid for it, it means that I'm losing on the exchange rate since I bought the shares respectively
I bought US shares with my GBP ac