As I recall, back in the good old days, it was possible to set up a second, cross-guaranteed account, so that one could be long a stock in their main account, and short the stock in the hedge account, allowing one to avoid the uptick rule, since one could sell their long position in the main account to be net short. This was called a "box" position. I also recall that this was made illegal some time ago. What I don't recall is whether it was just the cross-guarantee that was made illegal, or whether you had to always mark your sales short or not based on your total position across all accounts (at different brokers?). Anyone know for sure? Can I be short a stock in one account and long the stock in another account, perhaps at a different broker, and be able to sell the long stock without marking it a short sale? What if they are different types of accounts (i.e. IRA vs. normal margin)?