In response to your PM,
If by cost you are referring to the margin required to enter a short position on a penny stock, then yes I am very aware of the requirements. Clearly any penny stock below 1 cent does not make sense to short unless you have access to huge amounts of leverage. But assuming you can get the borrow, and at a juicy price of $0.70 cents you could have shorted 1000$ worth of GRNO for a mere $4000 in posted margin --> seems pretty attractive to me given the historical probabilities related to penny stocks chances for rising versus falling over time. If the stock drops 50% that works out to a 12% return on margined capital, and given that about 90% of pink sheets have no business being above $0.50, seems like an easy bet. Even at $0.38, it would only require about $7000 in margin to short and collect about $980. I am not short, nor do I plan to be, but dont assume that I do not know what I am talking about, you dont know me that well. Maybe you should concentrate on pumping sailboat gas