Ok, the title is a little misleading but the question is this: Say I have 2 brokerage accounts. I want to lose $5000.00 in account "A" and gain $5000.00 in account "B". (comissions are not important at this point). But I do not want to use the traditional method of wiring from one acct to the other. I would rather do it thru a "trade". What method should I use and which securities should I trade in order to accomplish this task, preferably in 1-2 transactions? Would it be legal?