I imagine that many of us want to participate in the market volatility triggered by the British European Union exit vote. I think it would help many of us if anyone who is feeling charitable and knows about such things could provide some quick guidance, ideally with references, about the rules that various exchanges have for reversing trades that they feel occurred in market conditions that were too chaotic or somehow unfair. The scenario that I think many of us want to avoid is that we take the risk of offering liquidity during a market panic, improving the price that our counterparties receive, but, then, after the markets revert, we are rewarded for this by having our best trades reversed or adjusted adversely. For my trading this morning, I am particularly interested in the rules on United States exchanges for trading VIX futures, options on volatility ETF's, and maybe stocks, but I welcome any informative posts providing information about these trade reversal procedures on other exchanges throughout the world, as I think it would be helpful to collect such information in an ET thread. I also realize that, because people are probably rather busy today, it is likely that little or nothing will be posted in time for people to plan their trades for today, but I think it would be helpful to have a thread about this topic for everyone's future reference. If there is already an EltieTrader thread on this topic or some other web page that succinctly collects these rules, I encourage you to post a link to that. I don't mean to ask people to duplicate what others have already done. I have searched EliteTrader and the web to little avail, perhaps because I just do not know the right terms to use. Thanks in advance for any helpful information. P.S. I apologize for not studying up on this in advance, given that the Brexit vote has been on the calendar for a while. I have no excuse for that!