Quote from tomahawk:
Thought I'd relay the info I just received on a call to Fidelity during this slow day.
Apparently there is no limitation to the frequency of trading with these commission-free ETFs, but the catch is they aren't marginable for 30 days, meaning that for daytrading you have to have the cash on hand to account for 3 day settlement on each trade. You're not going to be able to do 3 intra-day round trips of 1k shares of IWM (@ $65) with a $100k account, as I understand it.
