The DTCC moved ATTD to a "trade-for-trade" basis back on January 6, 2012. T.D. Ameritrade - always a little behind the eight-ball - just recently put a "chill" on its clients' ability to purchase ATTD stock based on the DTCC's January 6th action. SO FAR, T.D. Ameritrade is the ONLY major broker confirmed to have taken such action. NO ONE really knows what this means, IMHO, but I believe ATTD will become so big and significantly successful that these pissant penny-stock issues will one day be a fading memory. JMHO.
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