cjstocksup Thursday, 05/31/12 11:43:28 AM Re: Doc Holliday post# 28760 0 Post # of 253298 Interactive Brokers Thinkorswim from Ameritrade, and Tradestation are all here in the US however most are in Canada and overseas. At least the I Hub short groups I know on these boards all live in Canada, Germany etc. Also we have seen alot of retail MM shorting, that is MM's who have been naked short selling. Watch the MM's they have all been retail. I posted short numbers last night in bold.