Scottrade has a NO BUY/SELL ONLY restriction due to the DTC's suspension of services: Depository Trust Company (DTC) Response to OSC Temporary Order (May 25, 2007) <a href="http://www.dtc.org/impNtc/ope/ope_1641.pdf" target="_blank">http://www.dtc.org/impNtc/ope/ope_1641.pdf</a>