I am planning to put about £1000 in a US stock ($HCMC) because I have reason to believe that it will rise substantially in the coming month(s). However I’m fairly new to stock trading and am not familiar with the taxes that apply in the U.K., and whether trading US stocks will incur additional taxes (by the US government). If I made a healthy return on the trade would I be subject to UK AND US tax, or just U.K.? And what taxes (and rates) would they be? Thanks very much!