RE:Re: Pretium investigation of unusual trading activityYou get subpoenas/or search warrants to find out who was trading or selling that day. And you walk it back to a source and time and find out where the access points were. It should actually be pretty easy except that there will probably be multiple access points...(wouldn't it be great if it was one giant firm (say accountants) It used to be something we designed the SEC to do but perhaps they were all on government furlough- surfing porn from home.