Nio ( NIO ) targets a booming market for electric cars. The EV startup unveiled its newest electric SUV, a potential Model Y challenger, but competition is intensifying. Is Nio stock a buy right now? X Founded in 2014, Nio, sometimes called the Tesla ( TSLA ) of China, went on to deliver booming sales. Like Tesla, Nio makes luxury EVs. Unlike Tesla, Nio does not make its own electric cars, instead partnering with a state-owned auto manufacturer. Nio, Xpeng ( XPEV ) and Li Auto ( LI ) are startup rivals to Tesla in China, the world's fastest-growing EV...