Nio (NYSE:NIO) stock jumped 4% over the weekend after announcing June car deliveries doubled those from the year before.Nio delivered 21,209 cars during the month, its second record in a row. Deliveries for the quarter of 57,373 also exceeded previous guidance. Over the weekend, NIO’s gains erased most of its June 28 trading loss. The Chinese electric vehicle (EV) maker opened at $4.33 per share, with a market capitalization of about $9.4 billion. Other Chinese EV makers traded in New York were also up, inc ...