In addition, I already posted the link for everyone tonight that shows what happens if you trade a stock thru Penson that is subject to physical settlement. Every trade you make on a stock that is not DTC eligible thru a clearing firm like Penson (Zecco is one who clears thru Penson)you will get hit with extreme fees. The fees range from $125-$750, PER TRADE.
This is not secretive information. Its well known in the penny stock world.
PDOS got called out by the DTCC, and for that many brokers will not want to trade this stock anymore, not to mention that many of the brokers that don't "SELF-CLEAR" will hit you with massive fees to trade the stock, buy or sell.
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