Chinese electric vehicle (EV) maker Nio (NYSE:NIO) said it will report unaudited March quarter results on June 6. NIO stock is up about 1% in pre-market trading.CEO William Li said the company will maintain a “premium aura” even after launching its Onvo mass-market cars later this year. Like other Chinese brands, Nio has been buffeted by a price war and hopes to sell cars at $25,000 next year.Nio was due to open in New York this morning at $5.30 per share, a market capitalization of $11 billion. NIO stock i ...