S&P 500 Gains and Losses Today: UnitedHealth Stock Ails as Results Fall Short
1. S&P 500 fell 0.2% after three positive sessions. 2. UnitedHealth shares dropped 6.0% due to slumping revenue. 3. Increased medical costs raised UnitedHealth's medical cost ratio. 4. Analysts favor Dexcom, boosting its shares by 5.5%.