Market Rotation: Average Stocks Outperform Index as Chip Sell-Off Deepens

Key points

• The equal-weighted S&P 500 has outperformed the standard index by approximately 4 percentage points in October, reversing a 4.5-point lag from September.
• The PHLX Semiconductor Index has fallen 12% this month, even after a recent bounce where 57 of 60 tracked stocks rose.
• Consumer staples and energy sectors have led gains, with the energy sector up 13% and staples up 9% in October.
• Ryan Detrick of Carson Group suggests late October often marks a market bottom in midterm years, but acknowledges the current AI trade may disrupt historical patterns.
• Investors are rotating away from high-multiple AI growth stocks toward sectors with clearer earnings visibility, such as pool and boat manufacturers.

Background

This rotation follows a period of heightened volatility in late 2026, where concerns over AI capital expenditure sustainability triggered a sell-off in Big Tech. Earlier in October, markets saw brief rallies driven by optimism over Anthropic’s IPO filing and strong semiconductor gains, but these gains were short-lived. The current shift contrasts with the previous month’s heavy reliance on AI-driven growth, as investors now prioritize defensive assets and sectors with tangible revenue streams. The backdrop includes ongoing debates about Federal Reserve policy and inflation, with U.S. inflation remaining above 3%, influencing expectations for potential rate hikes in December.

How outlets are covering it

Yahoo Finance emphasizes the statistical significance of the rotation, highlighting that the current one-month reversal is the largest in favor of the average stock since 1990. It frames the shift as a potential 'buying period' ahead of the November 3 midterm elections, citing historical median gains of 1% in such years. Seeking Alpha, however, focuses on the qualitative shift in investor sentiment, noting that the market narrative has moved from AI optimism to skepticism about return on investment and productivity gains. While Yahoo Finance views the volatility as a temporary correction within a broader bull market, Seeking Alpha advises a cautious, selective stance, suggesting that the bull market may be maturing rather than breaking. Both sources agree that semiconductor weakness is the primary driver of the rotation, but they differ on whether this signals a temporary dip or a structural change in market leadership.

Why it matters

This rotation signals a potential shift in market leadership from high-growth AI stocks to more defensive and cyclical sectors, which could impact portfolio performance for investors heavily exposed to technology. The historic nature of the reversal suggests that the current sell-off may be nearing a bottom, but the uncertainty around AI spending sustainability and midterm election outcomes adds risk. Investors should monitor whether the equal-weighted index maintains its lead, as this could indicate a broader market correction or a temporary rotation. The outcome will also influence expectations for Federal Reserve policy and future earnings growth in the tech sector.

What to watch

Investors should watch for further signs of market breadth improvement, particularly in the equal-weighted S&P 500, as a potential indicator of a market bottom. The November 3 midterm elections will be a key catalyst, with historical patterns suggesting a late October low, but the current AI-driven correction may alter this timeline. Earnings reports from major tech companies will also be critical in determining whether AI spending yields durable earnings or if the sell-off continues. Additionally, Federal Reserve policy decisions and inflation data will influence market sentiment, with expectations for a potential rate hike in December if inflation remains above 3%.