Nio Soared Thanks to Big News Today -- Is the Stock a Buy?

Nio (NIO 10.81%) stock surged Tuesday. The Chinese electric vehicle (EV) specialist's share price ended the daily session up 10.8%, according to data from S&P Global Market Intelligence.On Dec. 23, the company revealed its ET9 ultra-luxury sedan at its Nio Day event. The company also took the wraps off its new, 5-nanometer (5nm) chip for autonomous driving. The U.S. market was closed for the Christmas holiday on Monday, but investors are showing their excitement for the new luxury vehicle and semiconductor ...