September Effect on AI Chip Stocks and Historical Market Data

Serdar HocamAuthor & Editor

The historical average negative effects of September on stock markets and their reflections on artificial intelligence chip stocks such as Nvidia, Broadcom, and AMD are examined.

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Not a Crash, Not a Correction: What the September Effect Really Means for Artificial Intelligence (AI) Chip Stocks

The September effect, traditionally felt in stock markets, can create periodic selling pressure and volatility on artificial intelligence chip manufacturers and semiconductor funds.

September Effect and Historical Markets

The September effect, seen as a traditional belief on Wall Street, creates general selling pressure in stock markets through fund rebalancing by managers.

While the S&P 500 index has experienced an average decline of 1.1 percent in Septembers since 1928, this situation stands out as a historical statistic.

Current Status of AI Chip Stocks

With the artificial intelligence revolution in recent years, semiconductor ETFs such as SMH and SOXX have exhibited varying performances in September.

While funds declined in 2023, they achieved strong gains in 2024 and 2025, reversing the traditional September decline trend.

Market Expectations and Investors

It is observed that investors can sell high-valuation artificial intelligence chip stocks due to liquidity at the moment of market anxiety.

It is emphasized that September alone is not a crash signal and that strong earnings and interest rate cuts can overcome this trend.