But the stock saw muted moves early Wednesday, falling about 2% despite the strong report. Some analysts chalked that up to concerns about whether demand will prove sustainable, especially in the wake of export restrictions on sales to businesses in countries such as China. Nvidia said it will feel a negative effect from the ban in the current quarter. The stock reaction may also simply reflect the fact Nvidia has more than tripled in 2023, climbing 230% — far and away the best performance in the S&P 500 — and 19% in November alone.