Nio (NIO 9.37%) stock is soaring Thursday following new vehicle announcements. The Chinese electric- vehicle (EV) company's share price was up 9.2% as of 3 p.m. ET. The gains came despite declines of 0.5% for the S&P 500 (^GSPC -0.40%) and the Nasdaq Composite (^IXIC -0.34%) at the same point in the day's trading. Nio debuted a new line of SUV models today, and investors are responding by bidding up its stock. As of this writing, the company's share price is now up roughly 40% over the last three months. Th ...