Quote from sharktrader:
exchanges that cancel trades suck. this is not professional at all. markets are for grown up people. every market participant is responsible for the trades he is entering, full stop. where do we arrive if an exchange can bust some trades and some not? what does the guy do that sold dax or ftse futures in the selling hole this afternoon based on the dow collapse and his trades do not get busted? what does the currency trader say who bought eur/usd at 1.1530 based on the dow spike and finds himself long the shit back @ 1.1510? there's no mum in there to cancel these trades.
i did not trade today, did not loose and did not win. but from my point of view, there is no discussion that never ever exchanges should allow for busting trades due to errors made by stupid jerks. such is life. if i sell 100 minis instead of 1, i loose a lot of money, no trades get busted, so why should we come up for an error of an even bigger jerk selling 10,000 instead of 100?
a similar thing happende some time ago in the eurex dax future. the most terrible thing was that for several hours while the market continued to move, it was not clear which trades were busted and which not, you did not have any idea whether you had a position, covered a position or whatsoever. completely irresponsible from the exchanges. my word is my bond. a trade is a trade, full stop. absolutely ridiculous what happened today.