From the "why does this keep happening?" file, it looks like the PBM sector is continuing to remain very profitable. Today it’s the turn of Express Scripts to announce that  its earnings were up 13 percent. It also revised up expectations for next year.  The stock rallied about 7%.

THCB continues to be baffled at how the PBMs and other health plans are getting away with this.  After all this is a group that has had no success in saving its clients’ money on drugs in the last 10 years, and a recent survey showed that fully one-quarter of employers believe that PBMs are responsible for increasing their drug costs.  But with the Medicare drug benefit giving the PBMs increased visibility and access to a whole new market of customers, it would be a brave short seller to look for the top to the stock here.