Hi there, I don't really fully grasp all of the rules behind margin in the commodity world. (Or let's be honest, in the equity world.) What can I do with the cash from short commodity options... ? I have a very large cash balance (offset by net short option value). Obviously some of this has to be on hand for exchange margin requirements... But in any case, can I direct my FCM to purchase treasuries with most/all of this cash, or anything else that would give me a little more extra interest?