We've seen them walk the price down with hundred share trades, even that one notable day when they did it on TEN share trades. The idea is, walk the price down on tiny volume which costs you practically nothing when you're trading with yourself, and try to panic REAL shareholders into selling you a lot at lowball prices. They make much more by buying thousands of shares cheaply, than they lose on a few hundred shares that they trade back and forth (downward) for a penny.