Nvidia (NVDA) experienced a notable increase in stock price, rising over 3.5% on December 23, marking its best performance since December 4. This surge contributed positively to the Nasdaq, which gained 0.98%, and the S&P 500, which rose by 0.73%. Meanwhile, Tesla (TSLA) reported strong sales figures in China, with 17,600 new vehicles insured in the week ending December 22, making it the fourth-best week of the fourth quarter. Tesla's Shanghai factory is sold out for the year, indicating robust demand as the company prepares for a record fourth quarter. In November, Tesla's China production reached 87,087 cars, the third-highest monthly total for the year. The overall electric vehicle market in China saw significant activity, with BYD leading with 87,700 insurance registrations for the same week.