Matria Mashed Again

O'Neil simply happened to recommend it last.

"If you are a half-empty short-term or 'expectations-driven' investor, we would suggest it is impossible to know whether MATR can pull (its current goals) off in the next few weeks and would suggest you avoid these shares until there is more visibility," he wrote. "On the other hand, if you are a half-full, long-term (investor), or focus more on the 'reality' of the company's accomplishments than on how the same stack up relative to 'expectations,' we'd suggest the risk/reward here is incredibly compelling."

O'Neil has a $50 price target on the stock. After Thursday's plunge, however, the stock is sitting much closer to the $22 target that short-sellers established some three months ago.