debt and risky investments are what brought drexel down. profitability is another concern. can't speak for the others but IB is debt free and profitable. in any event, all of these firms have plenty of insurance.
They are introducing broker for Bear Stearns (equities) and Lind-Waldock "A Division of Refco" (futures). TS Securities does not carry customer accounts. www.tradestation.com/aboutus/com_factsheet.shtm