My friend worked for a Prop firm in Wall Str for 4 months, then he wanted to quit. But the firm wouldn't give him his account balance, because they said that it's CBOE rule that the risk capital contributed should be kept for one year. Is this a scam or common? Can anyone answer this question? And there is another question: I recently received an offer of Prop trader, the offer is: I contribute Risk capital: 3K Firm give me :50K profit split: 80/20, they took 20% Commision: 1.5 / 100shares(round) 7.5/ 1000shares (round) No formal training, but a mentor who train you everyday. Do you guys think this is a good offer? Thanks for your answers!