Merck (MRK) stock slides as JPMorgan conference tests deal buzz and vaccine risk
Merck shares fell 1.1% to $109.27 Monday amid speculation over a possible $28–32 billion acquisition of Revolution Medicines, though no deal has been finalized. The SPDR S&P Biotech ETF dropped 2.1%. Analysts estimate Revolution’s RAS inhibitor drugs could generate over $10 billion in sales by 2035. Merck also faces a potential $2 billion annual revenue hit after U.S. vaccine schedule changes affecting Gardasil and RotaTeq.