Citibank has declared that the concept of "Mag 7" is dead: AI investment logic shifts from "tech giants" to "growth clusters".

Citigroup strategist released a heavy research report on Monday, officially declaring the death of the "Magnificent Seven" concept that has dominated the narrative of US stocks for the past three years. The strategy team led by Scott Chronert proposed to replace the Mag 7 with a new framework called the "Growth Cluster" as a way to assess investment opportunities in AI in the US stock market. This declaration comes as the Mag 7 earnings season kicks off Alphabet and Tesla are set to report their performance on Wednesday, with the market eagerly waiting to see if the massive AI capital expenditure can sustainable profit growth. Death of Mag 7: Internal relevance crumbling, five underperforming the market The Chronert team bluntly stated in the report: "In our view, the Mag 7 framework for evaluating the growth dynamics of the market's big stocks has been dead for some time." The core basis for this assessment is that the price correlation among the seven stocks has completely broken down. Due to the different positioning of each company in AI infrastructure investment, their stock prices have shown significant differentiation. Microsoft and Meta have fallen due to market skepticism about whether their massive capital expenditures will yield returns; Apple, on the other hand, has been well received by the market for not participating in the data center arms race and restraining capital expenditures, leading to a 23% increase this year. Earlier this year, Broadcom's weight surpassed Meta and Tesla in the S&P 500, triggering Citigroup to reevaluate the Mag 7 concept. Data confirms this differentiation. So far this year, only Apple out of the "Magnificent Seven" has outperformed the market, with Microsoft showing a 19% decline as the biggest loser. The Bloomberg Mag 7 Index has only risen by about 1.1% year-to-date, while the Nasdaq 100 Index has risen nearly 18%, and the S&P 500 Index has risen by about 10%. The Citigroup strategist likened the demise of the Mag 7 to the fade of FAANG, noting that just as FAANG was once synonymous with tech stock investments, it is now rarely mentioned. Chronert believes that the Mag 7 is at a similar turning point the label no longer explains the direction of AI trading but instead obscures the true picture of the market. New Framework: Growth Cluster - Market cap over half, contributing nearly half of profits Citigroup's proposed alternative is a broader framework called the "Growth Cluster." This combination not only includes large tech stocks but also encompasses most companies benefiting from AI infrastructure construction, including semiconductor companies, data center operators, and more. The Growth Cluster accounts for over half of the total market value of the S&P 500 and contributes almost 48% of profits. Chronert believes that compared to the binary system of "Mag X vs. the rest of the index," the Growth Cluster more accurately reflects the fundamentals and price dynamics of the index. On the valuation front, the cluster's forward price-to-earnings ratio for the next 12 months is in the 66th percentile over the past 30 years, and profit expectations for 2027 remain strong. Citigroup's data shows that profit expectations for the Growth Cluster have consistently exceeded expectations and have been revised upwards to an almost unrealistic extent. Citigroup divides all industries in the S&P 500 into three clusters cyclical, defensive, and growth. The growth cluster includes semiconductors and semiconductor equipment, software and services, technology hardware and equipment, media and entertainment, automotive and parts, among others. Chronert points out that while there may be controversy in individual classifications (such as Tesla dragging the automotive sector into the growth cluster and Amazon bringing non-essential consumption and retail into it), overall, the three-cluster framework helps tell the true story of the market. $3.2 trillion fund rotation: Shift in AI trading logic Citigroup's framework adjustment is based on a massive market rotation that has already occurred. Data shows that as of mid-July, the total market value of the US "Big Seven Tech Giants" has increased by about $1.5 trillion in July, while the semiconductor sector, excluding NVIDIA, has shrunk by nearly $1.7 trillion during the same period. These two movements have resulted in a market rotation of about $3.2 trillion between sectors. At the same time, the traditional software sector, previously squeezed by the AI concept, has rebounded significantly, with 44 out of 51 major software companies monitored showing an increase, with a median monthly increase of 6%. The essence of this rotation is the shift in AI trading logic from "capital spender" to "beneficiary." Interactive Brokers' chief strategist Steve Sosnick compared it to a cruise ship, where investors are rotating from AI "manufacturers" back to AI "users." Just like people moving from one side of the ship to the other, when one side becomes overcrowded, they move back. The change in behavior of retail investors is particularly evident. Vanda Research data shows that individual traders' buying activity in the Big Seven has been decreasing, with funds flowing into new AI sub-sectors such as storage chip companies like SK Hynix. Citigroup points out that in the five trading days leading up to July 17, retail investors only accounted for 6% of Mag 7 trading volume, the lowest in four years. Chronert accurately predicted last December that AI trading would shift from being the "enabler" of technology to the "adopter" by 2026. This rotation is currently unfolding gradually, with semiconductor stocks, which led the market in the first half of 2026, showing poor performance in recent weeks due to valuation concerns. Meanwhile, strategists like Manish Kabra of French Industrial Bank warn that it is still too early to buy into companies with the highest AI capital expenditure. The market is actively debating which part of the AI ecosystem builders, enablers, or users will generate excess returns in the next phase. However, Kabra does not believe that the AI boom has ended but judges that the market needs a "corrective pullback" for investors to re-engage. Key test of earnings season: AI capital expenditure faces "profit validation" moment Citigroup's declaration of the death of the Mag 7 comes at a delicate moment this week marks the critical window for the release of earnings reports from the Big Seven. FactSet data shows that profit for the Mag 7 in the second quarter is expected to grow by 31.1% year-on-year, higher than the 22.8% growth of the rest of the S&P 500 components. The Roundhill Magnificent Seven ETF (MAGS), which tracks the Big Seven, has rebounded by over 4% since July, putting an end to the decline from June's 9% monthly drop. However, there are still significant variables as to whether earnings reports can truly be a catalyst. Alphabet, Microsoft, Amazon, and Meta are collectively expected to have capital expenditures of up to $725 billion this fiscal year, a number that will rise to nearly $900 billion by 2027. The market is eagerly asking: when will such massive AI investments sustainable profit growth? Apollo Global Management pointed out that the earnings growth rate of the Big Seven is expected to slow down to 20% in 2026 and further decrease to 15% in 2027. The market is transitioning from a "growth narrative" to "profit validation." Conclusion: From Mag 7 to Growth Cluster, the rotation of AI investments Citigroup's declaration of the death of the Mag 7 is not just an update to the strategic framework but also reflects a profound shift in the investment cycle of AI from being narrative-driven to profit-validation-driven. For the past three years, the "Big Seven" has been synonymous with the bull market in US stocks in 2023 and 2024, these seven stocks drove the S&P 500 to record highs. Now, as AI infrastructure construction enters a "money-burning mode," the market is starting to differentiate between who is benefiting from AI and who is spending on it. Citigroup's "Growth Cluster" framework is a systematic response to this structural change. The new framework aims to go beyond the simple binary opposition of "Mag X vs. the rest of the index." Chronert believes that the "Growth Cluster" can more accurately reflect the fundamentals and price performance of the S&P 500 index. This shift in framework may accelerate the rotation of capital from giant tech stocks to other sectors or mid-cap growth stocks, but Citigroup emphasizes that this cluster will still be the main driver of market growth. With differentiation in internal returns among the Big Seven, a shift in AI trading logic from "who is spending" to "who is benefitting," and the Growth Cluster's profit growth four times that of defensive sectors, the Mag 7 label indeed struggles to carry the complexity of the market. As Chronert said, "This has happened before." From FAANG to Mag 7, from Mag 7 to the Growth Cluster the changing market labels are always a reflection of underlying changes in investment logic. For investors, the real challenge is not remembering the new labels but accurately identifying the true creators of value as AI trading transitions from "arms race" to "profit realization."