Analysts Warn Nvidia Investors of Seasonal September Volatility

Financial analysts are cautioning investors in Nvidia Inc. about the September Effect, a historical trend where major stock indexes typically experience weaker returns. Since 1928, the S&P 500 has averaged a 1.1% decline during September, and Nvidia is considered particularly susceptible to this volatility due to its high liquidity and significant index weight, which make it a primary target for institutional funds seeking to lock in gains.

Nvidia's performance during this period has been inconsistent in recent years, with a 10.3% drop in 2023 contrasted by gains in 2024 and 2025. Despite these seasonal fluctuations, the company's underlying business remains strong, driven by intense demand for data center chips.

Scott Rubner of Citadel Securities notes that the current 2026 midterm election year may amplify this seasonal weakness. Historically, markets tend to recover from these September dips in October.