As I've said in the past, it's hard to argue with the premise from an investment standpoint.
I do find this interesting:
But the PBM industry's "Holy Grail" is generic drugs sold via mail order.
Their prices are lower than those charged for brand-name drugs. But generics are more profitable, and eliminating the retail pharmacy from the transaction places all of that profit into the PBM's pocket.
I think it proves my point. If the PBM makes the money, does the sponsor really save?