China is the largest automotive market in the world, and investors have been following growing electric vehicle makers there, like Nio (NYSE: NIO), giving it a market capitalization of more than $60 billion even with the company yet to reach profitability. In August, that volatility led Nio shares to drop 12%, according to data provided by S&P Global Market Intelligence. Automakers globally have been battling supply chain issues, and they have begun to affect Nio as well.