Big Tech Falls Out of Favor: The Market’s New Momentum Trade (SPX)

Market snapshot

The U.S. stock market has advanced higher this year even as concerns over the Federal Reserve’s independence and rising tensions in U.S. foreign policy have persisted. Big Tech stocks are losing favor with investors; a prominent exchange-traded fund that concentrates on those names is on track for its longest monthly losing streak since 2023. At the same time, the S&P 500 index (SPX) has continued to move higher, with broader participation across sectors helping push the market toward record peaks in 2026.

Why the rotation matters

• Big Tech stocks have weighed on the S&P 500 (SPX) this year, reducing the index’s concentration in mega-cap returns.
• Investors are reallocating capital away from a narrow set of mega-cap technology names into other parts of the market. That rotation is improving market breadth — the proportion and variety of stocks participating in the rally — which supports more durable upside in SPX.
• A Big Tech-focused ETF being in its longest monthly losing streak since 2023 is a clear behavioral signal: money is flowing out of the largest names and into a wider set of equities.

These dynamics matter for professional traders and institutional investors because market leadership transitions change risk profiles. When a small number of mega-cap stocks drive gains, the index is more vulnerable to headline-driven drawdowns. Broader leadership reduces single-stock concentration risk and can allow indices such as SPX to make higher highs with lower idiosyncratic risk.

The new momentum trade: what it is, and why it works now

• Definition: The current momentum trade is the shift of investor capital away from Big Tech and into a wider set of market exposures that are contributing to improved breadth. Momentum in this context is defined by the flow of capital and price trends away from previously leading mega-caps.

• Why it’s persisting: Ongoing policy uncertainty around central bank independence and elevated geopolitical tension have changed risk appetites. These macro uncertainties can compress valuations on high-duration growth stocks (often represented by Big Tech) and make diversified exposure more attractive.

• Market mechanics: As money exits concentrated mega-cap positions, ETFs and active managers redistribute that capital. When redistributed into a larger cross-section of stocks, breadth indicators rise and the index’s advance becomes less dependent on a handful of names. That transition can sustain index-level momentum even as individual mega-cap returns lag.

What traders and analysts should watch

Key indicators and signals that help track this regime shift:

• Market breadth metrics: advance-decline line, number of NYSE and Nasdaq advancers vs decliners, and the percentage of stocks trading above their 50-day moving average.
• ETF flows: net inflows/outflows into Big Tech-focused ETFs versus broad-market or alternative ETFs. Persistent outflows from Big Tech-specific ETFs combined with inflows into broader exposures is a direct evidence of rotation.
• SPX behavior: whether the S&P 500 (SPX) can make new highs with a rising breadth profile. New highs accompanied by narrowing breadth suggest leadership concentration remains; new highs accompanied by expanding breadth support a broader, more resilient rally.
• Volatility and liquidity: changes in volatility measures and bid-ask spreads can indicate stress in concentrated names or shifts in market structure.

These indicators are practical for institutional allocation committees, portfolio managers, and quantitative traders seeking to validate a momentum trade away from concentrated tech exposure.

Practical trading and risk-management considerations

• Position sizing: When leadership is shifting, consider diversifying position sizes to reduce single-stock concentration risk that was previously compensated by mega-cap outperformance.
• Rebalancing rules: Use rules-based rebalancing that responds to breadth signals rather than absolute index levels. This helps capture rotation while controlling exposure to short-term reversals.
• Use of ETFs: Exchange-traded funds can efficiently express rotation without concentrated single-stock exposure. Monitor ETF liquidation patterns and creation units as real-time flow data.
• Liquidity and execution: Rotational trades can increase turnover in mid-cap and small-cap stocks; manage execution costs and slippage when reallocating capital.

Implications for institutional investors

• Portfolio construction: A durable expansion in breadth allows portfolios to achieve index-like returns with lower dependence on a few names. Institutional allocations can be adjusted to reflect a higher allocation to diversified beta or factor exposures that benefit from broad participation.
• Risk oversight: Risk teams should update stress-test scenarios to capture the impact of lower mega-cap correlation and higher idiosyncratic movement across a larger number of names.

Bottom line

Big Tech has stepped back from its leadership role this year, and that shift is measurable: a Big Tech-focused ETF is on pace for its longest monthly losing streak since 2023, and Big Tech stocks have been a drag on the S&P 500 (SPX). Investors rotating into a wider array of stocks are strengthening market breadth, which can sustain index-level momentum even as mega-cap performance cools. For professional traders and institutional investors, the trade is not simply "sell tech"; it is a structural rotation toward broader participation, requiring adjustments in portfolio construction, risk management, and execution strategy.