For over a decade, the S&P 500 has consistently outperformed the MSCI All Country World Index (ACWI), driven largely by the dominance of U.S. technology giants. However, in 2025, this trend is showing signs of reversal. Under President Donald Trump’s administration, a combination of aggressive trade policies and economic uncertainties has led to a narrowing performance gap between these two major indices, a dramatic change from the separation that Joe Biden’s administration had created.

A Shift in Market Dynamics

Today, the SPDR S&P 500 ETF Trust (SPY) is trading at $595.92, reflecting a modest year-to-date gain. In contrast, the iShares MSCI ACWI ETF (ACWI) stands at $125.20, having experienced a more robust recovery in recent months. This convergence is notable, considering the S&P 500’s historical outperformance.

Several factors contribute to this shift:

• Trade Policies: President Trump’s implementation of sweeping tariffs, including a 10% levy on all imports and higher rates on specific goods, has introduced volatility into U.S. markets. These measures have disrupted supply chains and increased costs for American companies, leading to cautious investor sentiment.
• Global Market Resilience: While U.S. markets grapple with policy-induced uncertainties, international markets, particularly in Europe and emerging economies, have demonstrated resilience. The MSCI ACWI, which encompasses a broader range of global equities, has benefited from this stability.
• Sector Rotation: Investors are diversifying away from U.S. tech-heavy portfolios, seeking opportunities in undervalued international sectors. This rotation has bolstered the performance of global indices relative to the S&P 500.

Investor Implications

The narrowing gap between the ACWI and S&P 500 suggests a potential shift in investment strategies. Diversifying portfolios to include a broader range of international equities may offer a hedge against domestic policy risks and tap into growth opportunities abroad.

As the U.S. navigates the economic impacts of its trade policies, the global investment landscape is evolving. Investors should remain vigilant, assessing the implications of domestic decisions on international markets and adjusting their strategies accordingly.

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