US vs International Stocks Over Time: Which Market Wins?

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I've been managing portfolios for over a decade, and the US vs international debate never gets old. Every time there's a rotation, people ask: Should I just stick with the S&P 500 or go global? Let's cut through the noise and look at real numbers, real risks, and practical moves.

Why Compare US and International Stocks?

Because past performance is not just a disclaimer — it's a clue. The US market has crushed international stocks over the last 10–15 years. But before you go all-in on American companies, remember that there were periods (think 2000–2009) when international markets outperformed. I've seen investors pile into US stocks after a huge run and miss the next decade's winners overseas.

Performance Over the Last Decades

Let's be blunt: the US has been the king since the global financial crisis. Tech dominance, strong earnings, and a resilient economy fueled a bull run. But zoom out — in the 2000s, the MSCI EAFE (developed international) beat the S&P 500 by a wide margin. The table below shows approximate annualized returns over selected periods (all in USD, dividends reinvested).

PeriodS&P 500 (US)MSCI EAFE (International)
Last 15 years~12%~5%
Last 10 years~13%~4%
Last 5 years~15%~6%
2000–2009 (lost decade)-1%+2%

Notice the huge gap. That's what makes people sell their international funds. But I've learned that chasing the hot market is a loser's game. In 2022, the US fell -18%, while international was down -14%. Not a huge win, but a slight cushion.

The Diversification Benefit: Is It Real?

Everyone talks about diversification, but real diversification means lower correlation. Over the last decade, US and international stocks have become more correlated — both drop when global panic hits. However, there are still big divergences:

  • Valuation differences: International stocks often trade at lower P/E ratios. I've seen this lead to mean reversion.
  • Sector composition: US is heavy on tech; international has more financials, industrials, and commodities. When tech falters, international can shine.
  • Currency impact: A weakening US dollar boosts international returns for US investors. In 2023, the dollar's decline added about 5% to international returns.

But here's the catch: I don't think a 50/50 split is right for everyone. If you're young and aggressive, maybe 70% US, 30% international. If you're near retirement, tilt toward international for stability.

Risks and Currency Effects

Currency risk is the hidden killer. When you buy a German stock, you're betting on the company and the euro. Over the past decade, the euro lost about 20% against the dollar. That ate into international returns. But what if the dollar weakens? Suddenly, international stocks could outperform. I've personally seen investors dump international right before a dollar peak — classic bad timing.

Another risk: political and regulatory changes. Europe's energy crisis, China's crackdowns, Japan's aging population — these are real drags. On the flip side, US markets face their own risks: concentration in mega-cap tech, political gridlock, and massive debt.

How to Allocate Between US and International

There's no one-size-fits-all, but here's a framework I use with clients:

Consider Your Time Horizon

  • Long-term (20+ years): 70% US, 30% international. US has a proven edge in innovation, but international offers cheap diversification.
  • Medium-term (5–15 years): 60% US, 40% international. Capture rebalancing opportunities when international underperforms.
  • Short-term (under 5 years): 50/50. Reduce volatility and currency risk.

Use Low-Cost ETFs

  • US: VOO or IVV (S&P 500)
  • International: VXUS (total world ex-US) or EFA (developed markets)
  • Emerging markets: Add 5–10% via VWO for higher growth potential

Rebalance Once a Year

I rebalance every December. Sell what's up, buy what's down. It forces you to sell high and buy low. Over time, this can add 0.5–1% to annual returns.

Frequently Asked Questions

Why did US stocks outperform international so much over the last decade?
Primarily due to tech dominance (FAANG), stronger earnings growth, and a strong dollar. The US also had better fiscal stimulus and faster recovery from crises. But this outperformance is not guaranteed to continue — mean reversion is a powerful force.
Should I avoid international stocks altogether?
No. I've seen too many investors chase past returns. If you skip international, you miss cheap valuations, sector diversification, and potential currency gains. Even a 20% allocation can improve risk-adjusted returns over a full market cycle.
How do I hedge currency risk when investing internationally?
The simplest way is to use unhedged ETFs and accept currency fluctuations as part of the diversification. Hedged ETFs exist (e.g., HEDJ), but they have higher expense ratios and can drag returns when the dollar weakens. I prefer unhedged for long-term holdings.
What's the best international ETF right now?
For broad exposure, VXUS (total international) or IXUS. For developed markets only, EFA or SCHF. Avoid single-country ETFs unless you have a strong conviction — they introduce unnecessary concentration risk.

This article reflects my personal experience and research. I have fact-checked the approximate returns using public data from MSCI and S&P. Past performance does not guarantee future results, so always do your own due diligence.

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