Look Beyond Today’s Stock Market Outperformers

Opportunities outside of the top performers.

It’s no secret that a small number of stocks in the S&P 500 have been largely responsible for the index’s sizable return this year. The ongoing artificial intelligence boom has propelled a select group of companies into the spotlight, including energy provider Vistra, chipmaker Nvidia, and AI software leader Palantir Technologies.

Because the S&P 500 is market-cap weighted—meaning the shares with higher market caps have a larger impact on overall performance—such stocks account for a big chunk of the index’s 2024 return.

A significant valuation gap has emerged between the top-performing megacap stocks and the rest of the market, creating a potential opportunity for savvy investors willing to dig deeper. While the S&P 500’s price-to-earnings (PE) ratio sits at 26.9, the equal-weighted version of the index—which gives no preference to the largest stocks—has a much lower PE ratio of 20.9, as shown in the chart.

That spread of 6 percentage points is the widest in 10 years.

Market cap vs. equal weight

Source: Bloomberg, calculations by Horizon Investments, as of December 2, 2024. The price-to-earnings (P/E) ratio measures a company's current share price relative to its per-share earnings. Indices are unmanaged and do not have fees or expense charges, both of which would lower returns. It is not possible to invest directly in an index.