All we need is some good press release. Today's action makes me think that any one of many non-IPIX people --someone in the research lab, the university that's also doing a study, or someone who works for whatever news wire service IPIX uses -- has leaked some kind of positive info out to someone.

Or it could just be that those who are short have figured out that they are skating on the edge of a cliff, and are covering their short position.

Edit: I suppose it could be good news from AlfaSigma, too, but given the crisis in Italy, that's way less likely.