Same for me on $GPGD. The worst thing is that the Zecco idiots have taken the 10% 20-day ADV rule without the $50k limit. Zecco doesn't allow trading more than 10.000 shares right now unless the order is sent by phone (which I can't as my spoken English is too basic). Do you imagine trading like that in a flurry of activity? Wait it's seventy-no!! it's fifty-wait!!! it's eighty-three.
So far I've found out the whole formula. The NSCC deposit requirement for Penson (for stocks under $0.01) is $0.01*number_of_shares.
That means the requirements to set my sell order of 405000 shares would be $4050, far below the $50k limit that could trigger a buy-in. That rule however can screw the triple zero players which move several million shares.
The SEC has been informed about this. Actually, the SEC itself opened the topic of microcap clearing and execution for discussion and it's open for comments till October 31.
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