Palantir stock surges as artificial-intelligence gains drive an earnings and revenue beat, while China begins an antitrust probe into Alphabet’s Google. Alphabet is scheduled to report quarterly earnings after the closing bell Tuesday.

Silicon Valley giants Apple (-3%) and Nvidia (-5%), two of the American multinational companies with the highest proportion of sales in China, faltered, while semiconductor chip players including Broadcom (-3%) and Intel (-3%) suffered as the industry heavily reliant on the global supply chain digested the trade conflict.

Electric-vehicle maker Tesla and traditional auto manufacturers General Motors and Ford fall but claw back losses with the U.S. delaying tariffs on Mexico for a month.