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Mega-Cap Pullback Fuels Interest in Equal-Weight and Ultra‑Low‑Fee S&P ETFs

Short-term weakness among the seven largest tech stocks is cutting cap-weighted returns and causing investors to reassess index weighting and tiny fee differences.

Overview

  • This week’s coverage (June 30–July 1) highlighted a short-term slide in the ‘Magnificent Seven’ that left a concentrated, market-cap S&P 500 lagging while the rest of the index rose.
  • Equal-weight S&P funds like Invesco’s RSP give each S&P 500 company roughly the same portfolio share, which lowers single-stock concentration and has helped RSP outperform the cap-weighted S&P over most of the past 25 years.
  • Fee competition is now a visible differentiator: State Street’s SPYM charges 0.02% versus 0.03% for VOO and IVV, and tiny expense differences can compound into meaningful gaps for long-term buy-and-hold investors.
  • A focused fund that holds only the seven largest tech names plunged more than 13% over a month while the rest of the S&P rose about 2.5%, a performance split that is renewing flows into equal-weight and alternative S&P exposures.
  • S&P 500 ETFs have grown from roughly $80 billion in 2006 to about $2.7 trillion today, underscoring the long-term popularity of passive cap-weighted exposure even as some investors rotate toward weighting or fee tweaks to manage concentration risk.