Nvidia's price-to-earnings (PE) ratio has fallen to 19.6, its lowest level since early 2019, as global markets react to worsening Middle East tensions and investor unease over AI sector sustainability.

The semiconductor giant, once valued at over $800 billion in market capitalization, has seen its stock price decline nearly 20% since October's peak. This downturn reflects broader market fears about inflation caused by escalating conflict between the U.S. and Israel over Iran, which could prompt central banks to raise interest rates.

Despite reporting rising gross margins-now at 75%-and increasing analyst forecasts for future earnings, the company's valuation has dropped below that of the S&P 500, which trades at around 20 times earnings.

Analysts are concerned that delays in AI infrastructure investments by major clients like Microsoft and Alphabet could slow revenue growth. Even so, Nvidia remains the dominant supplier of AI chips, having surged over 1,000% since ChatGPT launched.

"Everything’s changing rapidly," said Dennis Dick, a proprietary trader. "That’s the overall market concern."

Still, firms such as B. Riley Wealth continue to recommend Nvidia due to its undervaluation relative to broader market metrics.