Tesla (TSLA) started December on a positive note. As of December 4, the stock had risen 2.6% despite 2.2% losses in the S&P 500 index. Today, TSLA is extending these gains. It was trading with 0.9% gains at 2:22 PM EST against 1.5% losses in the S&P 500 index. At the same time, Tesla’s Chinese peer NIO (NIO) was up 2.3%. However, NIO has lost 8.2% in December so far.