Interesting and timely read. I use thinkorswim as my online brokerage. Just this evening, I received an email from TDAmeritrade, the parent of tos, to bring me up to date on the final steps of the integration of tos and TDA. One of the things mentioned was moving from Penson to TD Ameritrade Clearing, Inc., for clearing purposes. From the article:
Looks like TDA did just that!!
There was nothing in the email about not being able to trade sub-dime equities.
Good info.. I'm currently in a couple other stocks that just recently went non-DTC and in order to sell them off it could cost up to $1,000 in fee's... I think i'll be moving to trading dynamic options now as it seems the safer bet!