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.

The Dow Jones rose Thursday after higher-than-expected initial unemployment claims. Nvidia stock sold off, while Tesla reversed higher.