Quote from Don Bright:
The firms that are adequately capitalized (meaning that they don't have to use the traders money for net capital requirements) don't have to worry about FASB 150 or locking up capital. Those that have the traders money at additional risk must keep the deposit money for a minimum of one year to avoid the appearance of "BORROWing" money from their traders.
As always, get a copy of their balance sheet before committing funds (when you make out and submit your U-4 application).
Don