I got into PBIO today simply on spec based on the huge volume spike despite no news releases or other updated info. But the more I look into the company, the more it actually seems like a good investment. That's certainly the view of the analysts at Zacks, who are pretty well-respected. Just two weeks ago they issued a glowing new report on PBIO, while sticking-by a price target of $5.
The biggest RISK factor at the moment seems to be the possibility of being delisted from NASDAQ because the price has stayed below a dollar for too long -- based on the recent news stories about that issue, seems like the final word could come at any time. And I guess it's also possible a decision has already been made and leaked, which could account for today's volume & price spikes if that decision happens to be good news for PBIO. But that's just speculation...