The market's recent strength is not being driven by the mega-cap MAG7 stocks, which are underperforming. Instead, leadership has rotated to sectors like basic materials, healthcare, industrials, and financials. The breakout in the equal-weight S&P 500 confirms this widening breadth is occurring under the surface.
Related Insights
The perception of a market rally driven solely by a few tech stocks is misleading. The S&P 500 excluding the top 10 companies has seen strong earnings growth and consistent ~15% annual returns for the past three years, indicating broad market health.
The strong performance of biotech stocks in late 2025 wasn't solely driven by sector-specific news. A significant factor was a macro-level rotation of capital from generalist investors moving money out of cooling AI and tech stocks and into the undervalued healthcare and biotech sectors.
In an environment characterized by a series of sector-specific bull runs (e.g., from semis to metals), a winning strategy is to actively trade breakouts as they occur. This capitalizes on rotational leadership and momentum rather than relying on a static portfolio.
With the Federal Reserve signaling a market backstop, capital is flowing from concentrated large-cap tech winners into more cyclical, under-loved small-cap stocks (IWM). This support de-risks 'Main Street' sectors and signals a potential broadening of the market rally.
The current market is not a simple large-cap story. Since 2015, the S&P 100 has massively outperformed the S&P 500. Within that, the Magnificent 7 have doubled the performance of the other 93 stocks, indicating extreme market concentration rather than a broad-based rally in large companies.
An average stock's return is dictated more by external forces than company performance: 40% by the market and 30% by its sector, with only 30% attributable to idiosyncratic factors. This means correctly identifying a winning sector is nearly as valuable as picking the best stock within it.
The healthcare sector's current struggles are not a recent phenomenon but a five-year trend of underperformance. This has culminated in its market cap weight in the S&P 500 dropping to 9%, the lowest level in three decades, signaling a significant, long-term investor rotation away from the industry.
After years of piling into a few dominant mega-cap tech stocks, large asset managers have reached a point of peak centralization. To generate future growth, they will be forced to allocate capital to different, smaller pockets of the market, potentially signaling a broad market rotation.
Following a dovish Fed meeting, the outperformance of small-cap stocks (IWM ETF) versus large-cap tech is the key signal of a healthy, broadening market rally. This indicates capital is flowing beyond mega-cap names into the wider economy, confirming a "game on" sentiment for risk assets.
When a few high-flying stocks like the 'Mag-7' dominate the market, capital is pulled from other sectors, creating cyclical valuation discounts. Stable industries like healthcare can become as cheap relative to the S&P 500 as they were during the 2000 tech bubble, presenting a contrarian investment opportunity.
