Citi says the Magnificent Seven no longer define U.S. stock market growth, urging investors to look beyond familiar tech giants as new clusters drive S&P 500 earnings and AI reshapes sector leadership
For nearly three years, the Magnificent Seven-Nvidia, Apple, Microsoft, Alphabet, Amazon, Meta, and Tesla-served as Wall Street's shorthand for the companies powering the market's biggest gains. Investors who held these stocks captured much of the artificial intelligence (AI) boom and the outperformance of mega-cap tech. But according to Citi, that era is over. The bank's U.S. equity strategists now argue that the Mag 7 label no longer reflects where growth is coming from in the stock market, and that investors who stick to this familiar group risk missing out on new sources of earnings momentum.
Citi's latest research points to a widening performance gap. The Roundhill Magnificent Seven ETF, which tracks the group, has gained just 1% year-to-date, while the S&P 500 is up 9% over the same period. Microsoft, once a leader, is down 17% in 2026 amid concerns about heavy AI-related capital spending. This divergence isn't new-market watchers have noted for over a year that the Mag 7's dominance was fragmenting-but Citi's call formalizes the shift and urges investors to update their frameworks.
New Growth Clusters
Instead of focusing on the original seven, Citi has developed a "growth cluster" approach. This framework identifies a broader set of companies that have contributed most to S&P 500 earnings in recent quarters and are directly influenced by AI trends. The cluster spans six industries and now represents about half of the S&P 500's total market capitalization. According to Citi, this group outperformed both the Mag 7 and the broader index in the second quarter, rising 24.7% compared to the S&P 500's 14.9% gain. Year-to-date through Q2, the growth cluster is up 11.8%, outpacing the index's 10.1% advance.
Valuation is a key part of Citi's argument. The price-to-earnings-to-growth (PEG) ratio for the growth cluster is at a 15-year low, suggesting that investors can access AI-driven earnings growth at more attractive prices than the crowded mega-cap names. Citi's strategists warn that even expanding the group to a "Mag 10" would still miss significant contributors to S&P 500 earnings, such as Intel, Applied Materials, and Lam Research.
AI's Evolving Impact
While the Mag 7 label may be fading, Citi is not backing away from its conviction that AI remains a central force in the market. The bank estimates that about 55% of the S&P 500 is now directly affected by AI tailwinds or headwinds, with the growth cluster accounting for nearly half of the index's expected earnings over the next year. But the AI trade has become more complex. Some hardware and memory stocks linked to AI have suffered sharp declines-over the past month, the iShares Semiconductor ETF is down 18%, and the Roundhill Memory ETF has dropped 32%-as investors rotate and reassess valuations.
This dispersion is creating new opportunities, according to Citi. Not all AI exposure is equal, and some of the best-positioned companies are outside the original Mag 7. The bank's strategists argue that their cluster approach better captures the evolving landscape, where AI-driven growth is a theme that cuts across sectors rather than a club limited to a handful of familiar names.
Investor Implications
The practical takeaway for investors is that the old playbook-owning the Mag 7 to capture market growth-no longer works as it once did. Earnings growth is now more widely distributed, and many of the companies driving S&P 500 results are outside the traditional tech giants. Chasing the most popular mega-caps may expose investors to higher valuations without the same earnings momentum. Instead, Citi's data suggests that a broader, more flexible approach is needed to capture the next phase of AI-driven market gains.
This shift echoes broader trends in the market, as investors increasingly look beyond the largest tech names for growth. For example, Meta's recent rally has drawn attention to how AI bets can reshape company fortunes and investor expectations, as seen in this analysis of Meta's rebound and its impact on Mark Zuckerberg's net worth.
According to reporting by TheStreet, the Mag 7's run as a market-defining group has ended. The data shows that the market has already moved on, whether investors have updated their strategies or not. For those still anchoring their portfolios to the old group, Citi's research suggests it's time to reconsider where growth is really coming from in today's market.
According to S&P Dow Jones Indices, as of June 2026, the S&P 500's top 25 contributors accounted for roughly 60% of the index's year-to-date return, while the original Mag 7 made up less than a third of that impact. The S&P 500's forward price-to-earnings ratio stood at 20.5, compared to a 10-year average of 17.5, highlighting the importance of valuation discipline as market leadership shifts.
Market leadership in U.S. equities often rotates as economic cycles, technology trends, and investor sentiment evolve. The concept of clustering stocks by their earnings contribution or exposure to transformative themes like AI can help investors avoid overconcentration in a handful of names. While past groupings such as FAANG or the Mag 7 captured specific moments in market history, today's environment may reward those who look beyond familiar labels and focus on the underlying drivers of growth and profitability. As always, diversification, valuation awareness, and a clear understanding of risk remain essential for long-term investors navigating a changing market landscape.
