My guess regarding Renaissance Technologies is that the heat has been turned up behind the scenes regarding the relationship with FDA director, so they took a little nice ride up and is staying out for the resubmission and PDUFA. But since I am in small town Texas, what the heck do I know.
Another bumpy day shaking out retailers. If I devoted the time to my career that I have goofed on for the last few years watching this stock it wouldn't matter what the PPS did! LOL.