Michael Nguyen / NurPhoto via Getty Images Broadcom shares soared Monday on an OpenAI partnership Major U.S.stock indexes rose sharply Monday morning after President Donald Trump softened his tone on China. The Dow Jones Industrial Average, S&P 500 and Nasdaq Composite were each up at least 1.3% in recent trading, recovering from a selloff on Friday. Broadcom (AVGO) stock popped after the chipmaker and OpenAI announced a partnership for 10 gigawatts of custom AI accelerators. Shares of fellow chipmakers A ...