Portfolio Diversification Checker
TL;DR
- ▸True diversification means low correlation between assets, not just owning many funds.
- ▸A portfolio with 10 S&P 500 ETFs is less diversified than one with 3 uncorrelated assets.
- ▸Geographic and sector concentration are the two most common diversification mistakes.
- ▸Aim for exposure across at least 3 different asset classes and 4+ regions.
Diversification is one of the most misunderstood concepts in investing. Many investors believe they are diversified because they own multiple funds, but if those funds track the same market, geographic region, or sector, the diversification benefit is minimal.
This checker analyzes your portfolio's spread across geographies, sectors, and asset classes. It flags concentration risks and gives you a concrete score you can track over time.
What Is True Diversification?
True diversification means holding assets whose prices do not move together. The classic example is bonds and equities: when stocks fall sharply, high-quality bonds often rise, cushioning the blow. A global equity ETF provides geographic diversification but no asset class diversification. A well-diversified portfolio combines equities, bonds, real assets (real estate, commodities), and possibly alternatives, spread across multiple regions.
What Are the Most Common Concentration Mistakes?
The most common mistake for European investors is home country bias — overweighting Italian, German, or Spanish stocks relative to their global market weight. The second is sector concentration: many investors unknowingly hold heavy tech exposure through US-heavy global funds. The third is currency concentration: if all your assets are in EUR, a euro crisis would hit everything at once. Check for these three risks first.
Portfolio Diversification Checker
Herfindahl-Hirschman Index analysis for your portfolio
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Try DonkyCapital FreeHow to Improve Your Diversification Score?
Start by mapping every holding to its primary geography and sector. If any single region exceeds 50% of your equity allocation, consider a dedicated ex-USA or ex-home-country fund to rebalance. If you hold no bonds or real assets, even a small allocation (10–15%) can meaningfully reduce your portfolio's volatility without significantly impacting long-term returns. Adding a commodity or real estate ETF is often the quickest win.
Frequently Asked Questions
Is a global ETF enough diversification?
A global equity ETF like MSCI World gives you geographic diversification within equities, but it is still 100% equities. For true diversification you need other asset classes like bonds, real estate, or commodities.
How many funds do I need to be well-diversified?
Three to five well-chosen funds can provide excellent diversification. More funds do not automatically mean better diversification — what matters is that the underlying assets have low correlation.
Does crypto count as diversification?
Historically crypto has shown low correlation with traditional assets, which gives it some diversification value. However, its extreme volatility means even a small allocation can dominate your portfolio's risk profile.
What is home country bias?
Home country bias is the tendency to overweight investments in your home country. Italian investors, for example, often hold too much exposure to Italian banks and utilities. Italy represents less than 2% of global market cap.
Should I diversify across currencies?
Currency diversification is valuable for large portfolios. If you hold global funds, you already have implicit currency exposure. For most retail investors, this is a secondary concern after asset class and geographic diversification.
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