Where the shift is happening
Goldman Sachs' chief global equity strategist, Peter Oppenheimer, warns that the structural concentration that has defined the US stock market for over 15 years is now hitting a turning point. The capital expenditure race ignited by ChatGPT is steadily eroding the free cash flow of major tech players, while the rising cost of capital is narrowing their valuation advantage. Simultaneously, a profit-driven "great diffusion" is accelerating, with Japan, Europe, and emerging markets boasting strong momentum, and traditional sectors like industrials are seeing a re-evaluation. The era of betting solely on US tech stocks may be ending, and a genuine window for diversified returns is opening.
Understanding the breakdown of market dominance
The long-standing concentration in US equities is beginning to dissolve. In a recent report, Goldman Sachs' Peter Oppenheimer states that global equity markets are undergoing a healthy normalization process, with returns spreading across both regions and industries. This diversification is becoming increasingly valuable. Since the start of 2025, this trend of broad diffusion has clearly accelerated. While the US market has been the weakest performer among major regions, Japan, Asia-Pacific, and emerging markets have posted the strongest gains in local currency terms. At the same time, massive capital outlays from hyperscalers are continuously squeezing their free cash flow yields, prompting a downward adjustment in tech valuations. The spillover effects, however, are bolstering the growth prospects and valuations of traditional sectors like industrials.
The driving force behind the rotation
In a strategy report titled "Momentum, Rotation, and Value in Growth," Oppenheimer emphasizes that the current market rotation is driven by fundamental earnings, not valuation expansion or falling interest rates. He argues that the extreme concentration of market capitalization and earnings, which has persisted for over a decade, is now facing a structural shift. This creates increased opportunities for investors to achieve returns from truly diversified portfolios.
Tech valuations under pressure as free cash flow advantage shrinks
In the decade following the financial crisis, the tech sector enjoyed a continuous rise in profit margins and return on equity (ROE), becoming a core allocation for global capital. This was fueled by a light-asset business model, a surge in demand for cloud computing and software, and valuation premiums in a zero-interest-rate environment. However, the emergence of ChatGPT ignited a capital expenditure race among mega-cap tech companies. Oppenheimer points out that this capital spending super-cycle is fundamentally altering the sector's financial profile. Large-scale investments are persistently eroding free cash flow, forcing companies to turn to debt and equity markets for financing. Measured by free cash flow yield, the advantage of the US market, dominated by mega-cap tech, over value-oriented markets like Europe has narrowed significantly. This provides a fundamental basis for the recent rotation in relative performance. Furthermore, higher government debt, persistent inflationary pressures, and increased bond supply have collectively raised the cost of capital, making earnings growth the primary driver of stock market returns.
Earnings-driven rotation and the re-evaluation of traditional industries
Notably, this market diffusion is not spurred by a valuation bubble or loose monetary policy, but is built on solid earnings growth. Oppenheimer emphasizes that not only are earnings strong, but the direction of earnings revisions is also consistently positive, providing a dual confirmation of the market's fundamental support. The massive capital expenditures of mega-cap tech and chip companies, combined with increased government spending on energy security, critical infrastructure, and defense, have created a new capital spending super-cycle. The spillover effects of this cycle are re-energizing long-overlooked traditional industries, with sectors like industrials seeing a clear boost to both their growth prospects and valuations. At the national level, ROE across regions remains high, while individual stock correlations are declining. As the market's leading sectors continue to rotate, opportunities for alpha generation are rising. Oppenheimer believes that while the overall P/E of the US market has declined due to the tech sector's drag, it remains the most attractive market globally from an ROE perspective.
Why diversification is now more valuable
Goldman Sachs believes that the decline in stock correlations and the recent rapid unraveling of momentum strategies are accelerating the shift in market leadership. This creates a more favorable environment for investors to select value within growth sectors. Oppenheimer's core conclusion is that after more than a decade of extreme concentration in both market capitalization and earnings, global equity markets are undergoing a healthy normalization. Diversified allocation is once again yielding real returns. He expects this trend to continue evolving. For investors, this means the cost-benefit of exclusively betting on US mega-cap tech stocks is diminishing, while the logic of a balanced, cross-regional, and cross-sector allocation is being re-established.
Risk warning and disclaimer
Market risk exists, and investment requires caution. This article does not constitute personal investment advice and does not consider the specific investment objectives, financial situations, or needs of individual users. Users should consider whether any opinions, views, or conclusions in this article are suitable for their specific circumstances. Investment based on this content is at your own risk.
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