BANGKOK — Tokyo’s benchmark Nikkei 225 index dipped more than 4% on Wednesday and other shares in Asia also were mostly lower after a retreat on Wall Street spurred by selling of Big Tech shares.

U.S. futures were mixed and oil prices also fell.

The Nikkei fell nearly 5% early in the session but was down 2.8% by mid-afternoon, at 50,090.33.

Shares in energy and tech giant SoftBank Group sank 9.8% on jitters over its investments in artificial intelligence. Computer chip maker Tokyo Electron dropped 4.1%, while stock in Advantest Corp., a maker of semiconductor testing equipment, lost 7.2%.

South Korea's Kospi declined 3% to 3,997.71 as Samsung Electronics shed 4.9%. SK Hynix, which had logged major gains thanks to plans to develop artificial intelligence with chip maker Nvidia, lost 2.9

See Full Page