Invesco S&P 500 Equal Weight ETF: smartest buy for AI-bubble worry

The pitch rests on a structural contrast. A passive investor in a cap-weighted S&P 500 fund such as the State Street SPDR S&P 500 ETF Trust (SPY) or Vanguard S&P 500 ETF (VOO) has more than 30 cents of every dollar concentrated in only seven stocks, most of which trade at relatively high valuations. The Invesco S&P 500 Equal Weight ETF solves this mechanically: by attempting to give nearly equal weights to each holding, it reduces the Magnificent Seven's combined weight to 1.37% of the total portfolio. An investor who buys the ETF still owns Nvidia, Apple, and Microsoft — just in roughly the same proportions as Coca-Cola, Johnson & Johnson, and Chevron.

The valuation gap between the two approaches is equally striking. The cap-weighted S&P 500 trades at a Shiller CAPE (cyclically adjusted price-to-earnings) ratio of 40.7, near its second-highest reading in 155 years. The equal-weighted version trades at a significantly lower multiple, because the extreme valuations of the largest stocks are diluted across 500 equally weighted positions.

The trade-off is explicit. Over most 10-year periods that included a sustained mega-cap technology bull market, the Invesco S&P 500 Equal Weight ETF has underperformed the S&P 500, and investors who believe the AI trade has further to run will capture less upside than with a cap-weighted alternative. For investors genuinely worried about AI bubble risk, the fund offers continued full participation in the broad U.S. economy without the concentrated bet on the most expensive market leadership in modern history — at a 0.20% expense ratio that is rarely cheaper relative to the risk it hedges.