Mag 7 Gravity
The Magnificent 7 drove US stock gains in 2024 but lagged in 2025. Global all-cap diversification can help reduce reliance on a few dominant stocks.
If top stocks exert a gravitational pull on the broad market’s return, the Magnificent 7 have acted like the TON 618 black hole over the US the past few years.1 Accounting for about one-third of the S&P 500 Index’s weight2, the performance of these stocks has been a big driver of market-capitalization-weighted US large cap stock index returns.
This force can pull in a positive or negative direction. In 2024, the S&P 500 returned 25.0%. This was driven heavily by the Magnificent 7, which returned 48.3%. The other 493 stocks in the index collectively returned 15.9%. This year, the opposite effect has played out: The Magnificent 7 returned –12.3% through March 12, compared to –0.8% for the “S&P 493.”
The swings in performance for a US large cap index make a compelling case for global all cap diversification, which helps lessen exposure to the Magnificent 7. While non-US stocks underperformed the US in 2024, the MSCI All Country World ex USA IMI Index is outpacing the US thus far in 2025. Diversifying across regions and market capitalization is one way to mitigate the impact of a handful of stocks.
EXHIBIT 1
Index Returns for 2024 vs. 2025, as of March 12, 2025
Footnotes
1. Francis Reddy, “NASA Animation Sizes Up the Universe’s Biggest Black Holes,” National Aeronautics and Space Administration, May 1, 2023.
2. As of December 31, 2024.
Disclosures
The information in this material is intended for the recipient’s background information and use only. It is provided in good faith and without any warranty or representation as to accuracy or completeness. Information and opinions presented in this material have been obtained or derived from sources believed by Dimensional to be reliable, and Dimensional has reasonable grounds to believe that all factual information herein is true as at the date of this material. It does not constitute investment advice, a recommendation, or an offer of any services or products for sale and is not intended to provide a sufficient basis on which to make an investment decision. Before acting on any information in this document, you should consider whether it is appropriate for your particular circumstances and, if appropriate, seek professional advice. It is the responsibility of any persons wishing to make a purchase to inform themselves of and observe all applicable laws and regulations. Unauthorized reproduction or transmission of this material is strictly prohibited. Dimensional accepts no responsibility for loss arising from the use of the information contained herein.
This material is not directed at any person in any jurisdiction where the availability of this material is prohibited or would subject Dimensional or its products or services to any registration, licensing, or other such legal requirements within the jurisdiction.
“Dimensional” refers to the Dimensional separate but affiliated entities generally, rather than to one particular entity. These entities are Dimensional Fund Advisors LP, Dimensional Fund Advisors Ltd., Dimensional Ireland Limited, DFA Australia Limited, Dimensional Fund Advisors Canada ULC, Dimensional Fund Advisors Pte. Ltd., Dimensional Japan Ltd., and Dimensional Hong Kong Limited. Dimensional Hong Kong Limited is licensed by the Securities and Futures Commission to conduct Type 1 (dealing in securities) regulated activities only and does not provide asset management services.
RISKS
Investments involve risks. The investment return and principal value of an investment may fluctuate so that an investor’s shares, when redeemed, may be worth more or less than their original value. Past performance is not a guarantee of future results. There is no guarantee strategies will be successful.
CANADA
These materials have been prepared by Dimensional Fund Advisors Canada ULC. The other Dimensional entities referenced herein are not registered resident investment fund managers or portfolio managers in Canada.
This material is not intended for Quebec residents.
Commissions, trailing commissions, management fees, and expenses all may be associated with mutual fund investments. Please read the prospectus before investing. Unless otherwise noted, any indicated total rates of return reflect the historical annual compounded total returns, including changes in share or unit value and reinvestment of all dividends or other distributions, and do not take into account sales, redemption, distribution, or optional charges or income taxes payable by any security holder that would have reduced returns. Mutual funds are not guaranteed, their values change frequently, and past performance may not be repeated.
Resources
