Did you know that currencies can play a significant role in your investment returns? Yet most investors don’t consciously factor currencies into their decision about what to buy and sell. When you invest in shares, ETFs, investment trusts and funds you may be making a bet on currency without even realising.Holidaymakers will already know that sterling has been weak since the Brexit vote and that their pounds are worth less abroad than they were a few years ago. But the strength of sterling..