What's so hard to understand? They do it when you leave, hence the commissions stream is severed anyway. There is a prop firm that is well known for doing this, once you tell them you are leaving, you can forget all the money you have in your account. Their name is a synonym to the word "embrace". Why do they do it? Because NYC equity prop world is one of the shadiest business environments out there. Because daytraders have no lobbying power & no rights; they are viewed as numbers only. Because the turnover is so high that the reputations of the firms and people stay memorable in a fraction of the population of the industry at any given moment. Because there is always some college kid and/or ex corporate guy ready to jump into a sucker agreement without doing research. Because these firms are run by sleazebags who can only do one thing when times get tougher â steal & rip-off. And finally, because it is Wall Street mentality after all. RM and eagle, some great posts.