Data shows U.S. Big Tech’s lead over the S&P 500 has averaged 30.5 percentage points since 2015 but is weakening in recent periods.
U.S. Big Tech stocks have outperformed the S&P 500 by an average of 30.5 percentage points in rolling one-year periods since 2015. The analysis tracked the trailing relative returns of a basket including the “Mag 7” and Broadcom against the broader index.
Historically, Big Tech’s outperformance has been consistent, but recent rallies show diminishing margins. The trend suggests a potential shift in market leadership or valuation dynamics.
No immediate market reaction was specified in the data, though the findings highlight evolving sector performance trends.