Quote from logic_man:
I have a difficult time believing even that. How would a broker know if the particular trade wasn't part of a multi-part strategy executed through multiple brokers and if the entire multi-part strategy needed to be executed for the overall position to be profitable, e.g. a pairs trade or some elaborate correlation trade involving dozens of instruments, each of which played a different role within the strategy? Seems like only if the broker knew the entire context of the position would it make sense to reverse engineer anything. Also, brokers are in the business of broking, not stealing their customers' strategies. If a broker wants to be a trader, they would become a trading firm.
Does intellectual property theft go on? Sure it does, but it's more likely that it occurs between competitors within the same segments of the market, i.e. one bank tries to steal the intellectual property of another bank, than between segments, i.e. a broker stealing a client's intellectual property. If it happened as frequently as you guys imply, then we would see more trading firms vertically integrating to own their brokers, wouldn't we? No one would ever trust a third party to act as their broker.
Also, if this happened as frequently as the guy who made the initial comment I responded to suggests, wouldn't we have seen a lot of people caught and prosecuted for this? Surely not everyone who tries to do this is successful and gets away with it, right? Where are the guys who tried it and failed?
There is just so much conspiracy-mongering on this site.