Lol. No if you're at an IB or buy side institution there will be a stack of compliance rules on what you can or can't do. The no nos include stuff like intraday trading, buying anything on a restricted list or that the firm is buying for it's own account etc. You have to get sign off for each buy or sell and have to do it through a specified broker. So in short it's a right pain the ****. I don't think a cashier is going to qualify as an insider though...