I found it really interesting that with quite a bit of good news from a cancer conference this week, the Bios were still crammed down. MLNM,IMGN,GZMO, are three that should have had some sort of pop on news and they didn't.
My impression is that the sector is being muscled down. I am expecting that it is for final accumulation before a run.
We'll see if my impressions have any credibility :)