A word of caution: If you hold a security making a tax advantaged distribution (e.g., a tax free distribution) at IB, it appears that IB does not insure that the security is not loaned out on its ex-date -- so you may end up getting a payment in lieu of dividend (which is not tax-advantaged) instead! I admit that I never researched this. Other brokerage accounts I have, I noticed, keep such securities journaled as Cash instead of Margin, presumably to avoid this. Sigh. I think this is the first case where I've seen a serious shortcoming in the way IB does things. Now I gotta move these positions out of IB. I had this happen w/a tax free distribution. In theory it can also happen with long term cap gains from ETFs.... I will move those out come December just in case as well.