Although your handle contains Toronto, I'm thinking you live in Colorado and maybe are overbought at the dispensary today?
PHM down 1.8%, KBH down 3.5%, LEN down 2.5%. WLH has jumped more than those, so stands to reason on a pullback it would fall more than those.
Excuse me for offering up an opinion, trying to get an intelligent conversation going. Unlike most of the posters on these boards, I didn't personally attack you, make fun of you, etc. Instead, I just offered up a thought. Par for the course for these boards, you responded with sarcasm and derision.
Oil was at $30 on February 11 and is now at about $44. There are many other factors to consider that move the market.
ATHX is a small cap with very low float, not widely held. If fund managers need to raise cash in biotech they would be selling a bit of their Celgene, Gilead, etc. - not ATHX!