Free ETF Correlation Calculator
This free ETF correlation calculator measures how funds move together. Choose up to eight China-listed ETFs and instantly see the Pearson correlation coefficient for your focus pair plus a full correlation matrix across the basket — all computed from recent daily returns, with no sign-up required.
What the calculator does
Select two or more ETFs and a lookback period. The calculator pulls recent daily prices, converts them to returns, and computes the Pearson correlation coefficient for every pair. The first two funds you pick are the headline pair, shown with a plain-English interpretation and a scatter plot of their returns; the rest fill out a color heatmap from red (negative) through grey (zero) to green (strongly positive).
How to use it
Pick a fund from the curated dropdown, or type any 6-digit ETF code in the custom box, and add it to your basket. Repeat for each fund you want to compare. Choose a period — 1 month to 3 years — then press Calculate. Swap the first two chips to change which pair is the headline focus.
Reading the result
A value near +1 means the two funds rise and fall together; near 0 means little linear relationship; below 0 means they tend to move in opposite directions. As a rule of thumb, |r| above 0.8 is very strong, 0.6–0.8 strong, 0.4–0.6 moderate, and below 0.2 negligible. For diversification you generally want low or negative values.
Built for quick research
The calculator is designed to answer one question fast: do these funds move together? It is not a portfolio optimizer or a forecast. Correlations are computed over your chosen window and describe the past — they can and do change, especially in volatile markets. Use the result as one input, not a decision on its own.
Frequently asked questions
How many ETFs can I compare at once?
Up to eight. Beyond that the matrix becomes hard to read, so the tool caps a single comparison at eight funds.
What time periods can I choose?
1 month, 3 months, 6 months, 1 year, or 3 years of trading days. Shorter windows react faster but are noisier; longer windows are steadier.
Do I need to create an account?
No. There's no sign-up, no email, and no download — open the page and start comparing.