U.S. stock indexes are feeling pressure from better-than-expected reports on the job market and business activity.

Asian shares mostly rose Tuesday, deriving optimism from rising technology stocks on Wall Street, led by Nvidia. Japan's benchmark Nikkei 225 jumped 2.4% in morning trading to 40,248.68. Hong Kong's Hang Seng index slid 0.

Uber drove 3.2% higher after the ride-hailing app said it would accelerate $1.5 billion in purchases of its own stock, part of a previously announced $7 billion buyback program. Uber’s chief financial officer, Prashanth Mahendra-Rajah, said it’s making the move because its stock price looks cheap compared with the strength of its business.