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Investors betting on international stocks trouncing the U.S. are getting a rude awakening from the Iran conflict

By Mark GrundellMarketWatchMarch 5, 2026 at 7:53 PMBearish1 min read

Geopolitical Tensions Drive Capital to U.S. Safe Havens, Challenging Diversification Bets

The escalating Iran conflict has disrupted expectations for international stock outperformance, driving capital back to U.S. assets. This shift highlights how geopolitical events can quickly reshape investment flows, prioritizing stability over growth prospects outside the U.S.

Analyst sentiment: Bearish
What to watch next

Investors should monitor diplomatic efforts and any further escalation to gauge the conflict's continued market impact.

Key Takeaways

  • 1Geopolitical conflict in Iran is undermining the case for international stock outperformance.
  • 2Increased risk aversion typically redirects capital towards U.S. safe-haven assets.
  • 3International markets may experience short-term underperformance due to heightened tensions.

The Iran conflict is delivering a 'rude awakening' to investors who had bet on international stocks outperforming U.S. equities. Geopolitical tensions, particularly in the Middle East, often lead to increased risk aversion, disproportionately impacting emerging and international markets. This situation is likely to drive capital back towards perceived safe havens, such as U.S. assets, challenging the narrative of diversification benefits and potentially causing short-term underperformance for global ex-US portfolios. Investors should monitor geopolitical developments closely for further market shifts.

Investors who had positioned portfolios for international stocks to 'trounce' U.S. equities are facing an uncomfortable reality check from the unfolding Iran conflict. Prior to the recent escalation, many analysts pointed to more attractive valuations and stronger growth prospects in global ex-U.S. markets. However, geopolitical instability, particularly in the Middle East, often acts as a significant deterrent for capital seeking growth in riskier regions. This heightened risk aversion typically funnels investment away from perceived volatile international markets and towards traditional safe havens like U.S. Treasury bonds and U.S. large-cap stocks. Such a flight to quality can rapidly undo the capital inflows that international markets require for sustained outperformance, challenging the very premise of diversification benefits for investors who were overweight in global ex-U.S. assets. The shift underscores how macroeconomic and geopolitical forces can easily overshadow fundamental market analyses. Looking ahead, the duration and intensity of the Iran conflict will be critical factors determining how long this trend persists. Any de-escalation could see a swift reappraisal of international markets, but sustained tensions will likely continue to favor U.S. assets. Investors should remain vigilant, tracking geopolitical developments and their potential to influence global capital flows and asset valuations. The full implications for investors will depend on follow-through in price action, positioning data and forthcoming policy or earnings catalysts referenced above.

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