at a quess i would say that the seller that sold 500 k at 21.5 at 11.03 today is now back aboard at .195-.20 with either more stock or a $750 to a grand profit not bad on a down day and good luck to him,with such a small amount of shares avail he would have known that a 500k sell would spook the market and it did ,now who was it come on own up.