Mmmm , I am not 100 % sure but it could be its dual listed nature . This Lg Chem news was out on Twitter last night our time cause I was reading about it on Twitter about 11 pm last night , when the Us market was open but ours closed . Hence likely the shares started reflecting this information pre our opening in the Us , but before the announcement here this morning . Others might be more knowledgeable on this than me , but that might be the cause .