If you give an AI assistant your bank password and it moves money you never asked it to, your bank may get to treat that transfer as one you approved. The rule that decides it was written in 1979, back when the worry was a roommate borrowing your debit card. It's called Regulation E, and it's the reason you get your money back when a stranger drains your checking account. Buried in it is an exception almost nobody reads. If you hand someone your card or your login and they go beyond what you…