YC (US) < YC (GB) …int rate are high in GB than US…interest rate differentials tell us that US will depreciate & GB will appreciate
so american investor invested in britain= id - if < 0 , pays the interest differential if they hedge US dollar risk…so dont hedge
british investor invested in US = id - if > 0 , receives the interest differential…so hedge
However currency swings are large enough than interest rate differential, it is advisable to hedge currency risk even if you have to pay the interest rate differentials…