IB has an account called a margin ira account where you can daytrade (but not short) within a roth or traditional ira account. Basically it removes the T+3 restriction found on every other broker's IRA account for reusing funds. Is this type of account legit with the IRS? It seems that if that type of account was legit, every single broker would have a similar type of account to generate more commissions for themselves. Does anyone have any thoughts about IB's supposed "margin ira"? http://www.interactivebrokers.com/en/p.php?f=accountConfig&p=i&ib_entity=llc PS: I've called other brokers and they all say it doesn't sound legit. That IRA accounts MUST be cash accounts with the normal T+3 restriction.