Chinese electric vehicle start-up NIO (NIO) is trading about 2% higher ahead of its third quarter results expected after the close on Tuesday. This comes on the same day rival Tesla is soaring on news that the EV maker is set to join the S&P 500 (^GSPC). NIO’s trajectory has been much talked about this year. The company’s American Depository Shares have rallied over 1000% YTD.