GDTK - Looks like GDTK is another one old Penson shorted and now they are preventing investors from selling because they most likely do not have the shares to deliver to the buyers. I am sorry for the frustration many investors are feeling as a result of the Penson troubles. $500 to $700 fees is just as bad as naked short selling stocks into the ground.
News 
Market Data 
Discover 
AI
