AI-Led Rally Has Increased Market Concentration
Goldman Sachs believes investors should begin preparing for greater portfolio diversification after years of strong equity performance pushed global allocations heavily toward U.S. stocks and the technology sector.
The investment bank said portfolios have become increasingly exposed to a narrow group of assets, raising the potential impact of any reversal in market leadership.
Technology Profitability Could Become a Risk
Christian Mueller-Glissmann said the post-2022 recovery has been dominated by U.S. equities and artificial intelligence, fundamentally reshaping the global “World Portfolio.”
He warned that “the current AI capex boom increases the risk that falling profitability for mega-cap Tech stocks materially drags on equity returns before benefits from AI adoption show up.”
Goldman also highlighted inflation volatility and fiscal uncertainty as additional challenges, saying they are “creating headwinds for balanced portfolios, with less of a buffer from bonds and more risk of rate shocks.”
Long-Term Returns May Moderate
According to the bank’s macroeconomic forecasts, long-term equity returns appear likely to remain below historical norms under most economic scenarios.
Only a highly favourable combination of resilient growth and an extended AI investment cycle would produce returns above long-term averages.
Momentum Still Favours Equities
Even so, Goldman cautioned investors against exiting the market too early.
The bank noted that equities “deliver some of their strongest returns in the final years of a bull market, often led by the sector that outperformed in the preceding years.”
Goldman’s Five Portfolio Ideas
To remain invested while improving resilience, Goldman recommends:
- Investing selectively in real assets.
- Diversifying across investment styles and factors.
- Increasing regional diversification.
- Using long-dated call options where appropriate.
- Adding alternative investments with low correlation to traditional portfolios.
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