It was a volatile week on Wall Street, with the final two sessions delivering jolts to an AI-driven rally that had looked unstoppable.

(Bloomberg) -- Stocks fell after a disappointing outlook from Broadcom Inc. triggered doubts that the blistering rally in technology shares had gone too far.

(Bloomberg) -- A selloff in high-flying chipmakers weighed on stocks, with Broadcom Inc.’s underwhelming outlook testing the artificial-intelligence trade that has powered the…