ETF Overlap Calculator
The 2-fund overlap check is free, with no signup.Comparing mutual funds?
Enter two ETF tickers to see their shared holdings and how much of each fund's weight overlaps
The 2-fund overlap check is free, with no signup.Comparing mutual funds?
Questions people ask
How much ETF overlap is too much?
A common rule of thumb: above 70% is high redundancy, 40% to 70% is moderate, and below 40% is mostly complementary. The right level depends on your strategy and goals.
How is overlap calculated?
For each fund, MarketXLS adds up the portfolio weight it holds in securities the other fund also holds, using the latest reported holdings. The result is directional, so each fund gets its own percentage. Short or derivative positions (negative weights) are excluded, which keeps each figure between 0% and 100%.
Why does overlap matter?
High overlap quietly removes the diversification you thought you were buying and concentrates your risk in a handful of names.