Shares of the graphic-chip maker, already the world's largest company by market value due to its extensive and rapidly growing artificial-intelligence business, soared by roughly 5%.

Among other AI ventures, Vertiv Holdings rallied on reports that it launched a joint venture with Compass Datacenters on a new cooling system to be used in AI data centers.

Alphabet's Google will face pressure from the Department of Justice to sell its Chrome browser unit, as U.S. antitrust regulators investigate links between the firm's different business lines.

Software firm MicroStrategy, which has built up a multibillion dollar stockpile of digital currency bitcoin, rose in tandem with the price of bitcoin.