Interactive Brokers allows you to borrow shares however that kind of shorting is good for the stock. The shorting that has hurt IPIX is called naked shorting and abusive naked shorting is criminal although for the most part regulators tend to look the other way. Lots of information available on this if you want to know more. I paid way more than a dollar for some of my shares and would not consider selling any shares until they are in double digits and evem tjen likely only a few. We have the science and it is outstanding. Hope this helps. Go IPIX!!!