China has launched an antitrust investigation into Qualcomm Inc.'s planned acquisition of Autotalks, a move targeting another major US technology firm that comes just before a pivotal meeting between the leaders of the two countries. The probe had an immediate negative impact on the US chipmaker's stock. ...

Shares of Nvidia (NVDA -4.36%) tumbled last week after the company announced that it would take a charge of up to $5.5 billion related to China export restrictions. The company said it would no longer be able to export its H20 chip, a less powerful version of its H100 GPU and designed to comply with earlier export rules, without a license. Nvidia's filing implies that getting a license is unlikely. Wall Street analysts had varying estimates of the impact to Nvidia's bottom line. Wedbush said that the restri ...