International stocks pummelled the S&P 500 with 32% returns in 2025. What to know before adding them to your portfolio

International equities significantly outperformed the S&P 500 in 2025, delivering returns 32% higher than their U.S. counterparts. This shift signals a departure from the recent dominance of U.S. markets, particularly the 'Magnificent Seven' tech giants. Investors are increasingly diversifying capital into international markets, driven by more attractive valuations, a stabilizing U.S. dollar, and robust growth in both emerging economies and European industrial sectors. This trend underscores a potential multi-year rebalancing of global portfolios, harkening back to similar cycles seen in the early 2000s where broader diversification led to superior risk-adjusted returns. The outperformance suggests that the premium previously commanded by U.S. artificial intelligence and tech plays may be eroding. Investors are now turning to 'Old Economy' value plays and high-growth Asian markets, where margin expansion is accelerating. This rotation highlights the importance of geographical diversification as a core component of investment strategy, especially as global economic conditions evolve. Factors such as divergent central bank policies and geopolitical stability in key regions will continue to influence capital flows and market performance. For investors, key considerations moving forward include assessing currency hedging strategies, monitoring geopolitical developments in regions like Europe and Asia, and evaluating the impact of varying economic growth rates across the globe. The critical question remains whether the recent outperformance of international stocks is a fleeting rally or the beginning of a sustained structural shift in global investment patterns. Upcoming economic data releases and central bank guidance will provide further clarity on this evolving dynamic.