Quote from Dustin:
This happens all the time. It is the traders responsibility to determine whether the trade will stand prior to closing the position.
How can he determine whether the trade will stand if the exchange is not making a decision?Some trade busts have occurred up to 8 hours after a trade. That is a long time to not know your risk during a market crash with >10% moves in the index futures. How is it fair to impose that risk and uncertainty on a liquidity provider during a crash, because some moron can't sell a position properly? You are rewarding failure and punishing diligence and liquidity provision, a totally anti-market, anti-risk-taking, and anti-trader policy.
Look, it's obvious to me that many of you on this thread just don't have much experience with trade busts during true market crashes (as opposed to large but orderly declines). Stop nit-picking over obvious cases like a stock at $0.01, and try to wrap your brains around the idea of the main market trading down 20%+ intraday, with no bids at all. That's what an actual crash looks like (e.g. 9/11). The idea of a "gift" or clearly erroneous price in that situation is basically a joke. On 9/11 when the news wires reported "explosion at the Pentagon", it could have been WWIII or a bunch of suitcase nukes going off. Anyone bidding at any price at all, even down 50% or 75%, was taking *real risk* of losing on that trade if the worst case scenario had taken place. Busting trades in such a situation, after the fact, when fair value is known (which it wasn't at the time of the trade) is simply robbery. Try having on a 7 figure position for 8 hours in a market that wasn't even fat fingered, and managing the risk in volatile conditions when you know it's 50/50 that an old boy's club will make the right calls and get the trade busted. You can't hedge it because you don't know if you're long or flat. The market could easily turn back down and go below your entry price and then crash, handing you a huge loss. That is just an unacceptable risk to inflict on someone providing liquidity. It deters people from placing bids or sales in a crash scenario, which defeats the whole purpose of having a market in the first place.
There is literally nothing that trades busts solve which trade price adjustments don't. It is an indefensible policy. Trade adjustments avoid the problem of a fat finger making you bankrupt overnight, whilst still allowing market-making in a crash, keeping market integrity (i.e. if you make a buy or sell you KNOW 100% it will stand, you can be sure of your position even if the price is later adjusted), and letting free trade take place at the current going rate set by willing buyers and sellers (as opposed to a frozen market at 0.01 bid 0.05 offered because no one will bid or lift the offer because they know it will be busted. 2 people who want to trade at $20 cannot do so.)
No one on here who has tried to defend trade busts has provided a single reason why they are not grossly inferior to trade adjustments. No one has shown how they do not ruin market liquidity, no one has shown why the erroneous party has to be let off scot free or why selling 1 tick above the bust range should be punished massively while selling 1 tick below should be rewarded by total removal of all losses etc.
I would like to hear an explanation from trade bust supporters as to why they go on supporting it without providing even a single rebuttal against the points I've made.