The problem with margin calls is that it is based on the marginability of stocks in your portfolio. If you have 300k in qec, and the stock is no longer marginable, then you have to cover as if you did not own it. I am not saying that people just have QEC in their portfolio but that the overall effect of it closing below 2$ will see a lot of people either liquidating part of their other holdings or QEC. The next support level is going to be around 1.35 if I recall, so IMHO I believe the stock will drop further tomorrow. It is not trading on fundamentals as the market in general is the pits. It sucks but it will come around either when the market corrects or news pushes it back up.