If a retail (non-professional) account owner is short-selling a stock via CFD and applying a normal, non-guaranteed stop, what will happen if a force-majeure event happens? Since during short-selling stock price can go up infinitely, in case of a major unfavorable event that may prevent IG from triggering a normal stop, can the account holder be held responsible for the losses in excess of his/her deposit? Is he protected against the negative balance by the ESMA regulation? Besides, I don't see how one can claim to be using Guaranteed Stop, except by making a print screen during trade opening.
Thanks