My opinion on PFE's potential split-up is unchanged: Regardless of what happens with AZN, I don't think a split-up will create material shareholder value and it may destroy shareholder value.
For capital-gains-tax reasons, I hope the PFE-AZN merger doesn't go through. I manage family accounts where PFE is owned at a minuscule cost basis.
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”