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.

When three patients die after taking a cutting-edge drug, most companies hit the brakes. Not Sarepta Therapeutics. The ...

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 ...