ETF Overlap Calculator
Compare any two US-listed ETFs with comprehensive portfolio overlap analysis
Help Us Build Premium ETF Tools
Share your insights in 4 quick questions • Get LIFETIME free access
Frequently Asked Questions
How much ETF overlap is too much?
Generally, ETF overlap above 70% indicates high redundancy and may reduce diversification benefits. Overlap between 40-70% is moderate and manageable, while below 40% suggests good complementary exposure. However, the "right" amount depends on your investment strategy, risk tolerance, and portfolio goals.
How is ETF overlap calculated?
ETF overlap is calculated by comparing the holdings of two ETFs and determining what percentage of each ETF's portfolio weight is shared with the other. We use CUSIP-level data to ensure accurate matching of securities and calculate both the number of shared holdings and their weight contribution to each portfolio.
Why does ETF overlap matter for investors?
ETF overlap matters because high overlap between your holdings can reduce diversification benefits and create unintended concentration risk. Understanding overlap helps you make better portfolio allocation decisions, avoid redundant investments, and ensure your ETF selections truly complement each other.