IMO, It is possible....the sec made a half effort to deal with it, putting companies on a watch list blah, blah blah. Naked shorting? Maybe. The mm's imo, operate on the otc like it is the wild west.

Iowned shares in a company awhile back that took a nose dive for no apparent reason. I called the brokerage house that originally sponsored it's IPO. His response.....A certain group(religious reference) were intent on driving(shorting) the company into submission. They succeeded.