Key Points Nio is selling more and more of its new mass-market brand EVs. Those brands are the key to Nio accelerating volume growth. Nio stock has more than doubled in the last three months. 10 stocks we like better than Nio › Nio (NYSE: NIO) stock has been on the move higher this week. As of Thursday, 2:45 p.m. ET, shares of the Chinese electric vehicle (EV) maker have jumped by 11.8%, according to data provided by S&P Global Market Intelligence. While the move continues an upward trend since J ...