ETF Overlap Tool
Enter up to six ETFs to see how much of each is the same securities. Overlap by weight is the sum, over every holding two funds share, of the smaller of the two weights: 100% means identical portfolios, 0% means nothing in common.
Overlap by weight
26 holdings in all 2 funds| Fund | CMF | GCAL | Positions | Holdings |
|---|---|---|---|---|
| CMFiShares California Muni Bond ETF | — | 1% 26 shared |
1,877 | as of Oct 23, 2026issuer data |
| GCALGoldman Sachs Dynamic California Municipal Income ETF | 1% 26 shared | — | 417 | as of Oct 23, 2026issuer data |
Each cell: overlap by weight, and how many positions the two funds share. Stocks, funds and bonds are compared, a bond by its own identifier and a Treasury bill by its maturity date; cash and derivatives are not, and a fund that is partly either shows how much of it is compared.
Held by both funds
0.9% common weight| Holding | CMF | GCAL | Smallest |
|---|---|---|---|
| BAY AREA TOLL AUTH CALIF TOLL 5%, due Oct 1, 2033 | 0.14% | 0.22% | 0.14% |
| CALIFORNIA ST 5%, due Dec 1, 2028 | 0.08% | 1.29% | 0.08% |
| CALIFORNIA MUN FIN AUTH REV 5%, due Jun 30, 2032 | 0.08% | 0.86% | 0.08% |
| AMADOR WTR AGY CALIF CTFS PART 5%, due Dec 1, 2030 | 0.07% | 0.57% | 0.07% |
| UNIVERSITY CALIF REVS 5%, due May 15, 2037 | 0.06% | 0.45% | 0.06% |
| LOS ANGELES CALIF DEPT WTR & P 5%, due Jul 1, 2044 | 0.06% | 0.17% | 0.06% |
| CALIFORNIA EDL FACS AUTH REV 5%, due Jun 1, 2046 | 0.05% | 0.43% | 0.05% |
| RIVERSIDE CNTY CALIF TRANSN CO 4%, due Jun 1, 2037 | 0.04% | 0.13% | 0.04% |
| CALIFORNIA STATE UNIVERSITY 3.15%, due Nov 1, 2032 | 0.03% | 0.50% | 0.03% |
| SAN DIEGO CALIF UNI SCH DIST, due Jul 1, 2031 | 0.03% | 0.35% | 0.03% |
| LOS ANGELES CALIF DEPT WTR & P 5.5%, due Jul 1, 2046 | 0.03% | 0.69% | 0.03% |
| BAY AREA TOLL AUTH CALIF TOLL 3%, due Apr 1, 2054 | 0.06% | 0.03% | 0.03% |
| UNIVERSITY CALIF REVS 5%, due May 15, 2038 | 0.03% | 0.41% | 0.03% |
| LOS ANGELES CALIF DEPT WTR & P 5%, due Jul 1, 2028 | 0.02% | 0.13% | 0.02% |
| SOUTHERN CALIF PUB PWR AUTH SO 5%, due Jul 1, 2029 | 0.02% | 0.27% | 0.02% |
| LOS ANGELES CALIF UNI SCH DIST 5%, due Jul 1, 2029 | 0.02% | 0.60% | 0.02% |
| CALIFORNIA INFRASTRUCTURE & EC 5%, due Jul 1, 2029 | 0.02% | 0.06% | 0.02% |
| LOS ANGELES CALIF DEPT WTR & P 5%, due Jul 1, 2028 | 0.01% | 0.41% | 0.01% |
| CONTRA COSTA CALIF TRANSN AUTH 5%, due Mar 1, 2030 | 0.01% | 0.06% | 0.01% |
| LOS ANGELES CALIF UNI SCH DIST 5%, due Oct 1, 2027 | 0.01% | 0.03% | 0.01% |
| IMPERIAL CALIF IRR DIST ELEC R 5%, due Nov 1, 2046 | 0.01% | 0.37% | 0.01% |
| LOS ANGELES CALIF UNI SCH DIST 5%, due Oct 1, 2027 | 0.01% | 0.02% | 0.01% |
| SAN DIEGO CALIF UNI SCH DIST, due Jul 1, 2041 | 0.01% | 0.16% | 0.01% |
| FOOTHILL / EASTERN TRANSN CORR, due Jan 1, 2028 | 0.01% | 0.04% | 0.01% |
| ALAMEDA CORRIDOR TRANSN AUTH C, due Oct 1, 2048 | 0.01% | 0.23% | 0.01% |
| CALIFORNIA STATEWIDE CMNTYS DE 5%, due May 15, 2040 | 0.01% | 0.21% | 0.01% |
Reading overlap
Two funds with 80% overlap move together and holding both mostly doubles one exposure and both fees. Low overlap is not the same as diversification: two funds can share no holdings and still be driven by the same factor. To see what a whole portfolio owns, use the portfolio x-ray.
Holdings come from each issuer's daily file where we have one and otherwise from the fund's latest SEC filing, so the two sides of a comparison can be from different dates. The table shows each fund's date.
Bond funds are matched issue by issue: two Treasury funds overlap only where they hold the same bill, note or bond. A fund of short-dated bills replaces its whole portfolio every few months, so holdings from an older filing may have matured; the table says when they have.
Fund data comes from each fund's SEC filings and issuer disclosures and is shown with the date it is as of. SEC portfolio and flow filings become public about 60 days after the period they cover. Nothing here is investment advice; see Terms.