A friend of mine who works at a hedge fund reached an agreement with me: If I provide inside information to him and he makes any profit, he will share 50% of the profit with me. So today I called him 5 minutes before 11:00am and gave him the precious inside information on oil inventory. I told him that the inventory is up big time and that the market would tank big time after the report was made public 5 minutes later. (Where did I get the inside information? Well, I would like to keep it a secret. Suffice to say that I paid big money for this information). Anyway, I gave my hedgie friend the inside information and he shorted 200 contracts right away (one of his secretaries told me). I don't know when he covered, but I am sure he made a huge amount of money. But he told me he didn't act on my inside information and that he didn't make a dime. Basically he refused to pay me! My question is: Can I sue him for violating our agreement? Do I have a case to bring him to court?