The death of a third patient tied to a Sarepta Therapeutics gene therapy this year sent the company’s shares nosediving 36% Friday, halting the momentum the stock generated just a day earlier after ...

Just a day after the S&P 500 and Nasdaq climbed into record territory, U.S. stocks end mixed, with American Express (AXP) and 3M (MMM) dragging the Dow, and more tariff drama muting markets.