How much international stock should I own?
Most financial experts suggest 20-40% of your stock allocation in international equities. International stocks provide diversification benefits—different economies perform well at different times. While US stocks have outperformed recently, international diversification protects against extended periods of US underperformance.
This is a question that divides even professional investors. Let me give you both the data and the practical considerations.
The case for international:
- About 40% of global stock market value is outside the US
- US and international stocks don't move in lockstep—diversification benefit
- The US won't always be the best-performing market
- Emerging markets offer higher growth potential (with higher risk)
The case for US-heavy:
- US companies are global (Apple sells everywhere)
- US markets are more efficient and transparent
- Currency risk adds complexity
- US has outperformed international for 15+ years
What the research says: Historical data shows the "winner" rotates. US stocks dominated 2010-2024, but international led 2000-2009. Owning both smooths returns over full market cycles.
Common allocations:
- Conservative: 10-20% international
- Moderate: 20-30% international
- Aggressive/Global: 30-40% international
My take: 20-30% international is a reasonable middle ground for most investors. You get diversification benefits without being overly exposed to currency risk and less-familiar markets.
Implementation:
- Developed international (Europe, Japan, Australia): More stable, lower expected return
- Emerging markets (China, India, Brazil): Higher growth potential, more volatile
- A typical split: 15-20% developed, 5-10% emerging
What matters most: Pick an allocation you can stick with. If international stocks underperform for years, will you abandon ship? If so, consider a smaller allocation you can hold through the rough patches.