The major indexes added to strong weekly gains. Tesla and AI chipmakers such as Nvidia and Arm are testing key levels.

Purdue Pharma's Sackler family owners have struck a new agreement to settle mass opioid litigation against them for a total of $6.5 billion, New York Attorney General Letitia James said Thursday.

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Traders cautiously treaded water Thursday after days of euphoria in the wake of the inauguration of President Donald Trump and a flurry of pro-business policy announcements. Dow Jones Industrial ...