 Stocks turned mixed after a higher open. The Nasdaq is rallying. Nvidia's shares are up more than 3%. The company is said to be working on a new version of its AI chips for the China market that will be compliant with current U.S. export controls. Verizon Communications shares are down 6%. Earnings matched Wall Street forecasts. The quarter was weaker than a year ago, and its revenue was disappointing. Verizon also admitted its customers are waiting longer to upgrade phones.