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
31 holdings in all 2 funds| Fund | CATF | CMF | Positions | Holdings |
|---|---|---|---|---|
| CATFAmerican Century California Municipal Bond ETF | — | 2% 31 shared |
287 | as of May 31, 2026SEC filing |
| CMFiShares California Muni Bond ETF | 2% 31 shared | — | 1,840 | as of Oct 20, 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
2.4% common weight| Holding | CATF | CMF | Smallest |
|---|---|---|---|
| State of California 4%, due Mar 1, 2036 | 0.26% | 0.33% | 0.26% |
| San Francisco City & County Public Utilities Commission Wastewater Revenue 4%, due Oct 1, 2048 | 0.53% | 0.25% | 0.25% |
| State of California 4%, due Sep 1, 2043 | 0.97% | 0.23% | 0.23% |
| Foothill-Eastern Transportation Corridor Agency 4%, due Jan 15, 2046 | 0.50% | 0.22% | 0.22% |
| Sacramento Municipal Utility District 5%, due Aug 15, 2049 | 0.37% | 0.15% | 0.15% |
| State of California 5%, due Mar 1, 2055 | 0.14% | 0.31% | 0.14% |
| San Diego Public Facilities Financing Authority 5%, due May 15, 2054 | 0.61% | 0.12% | 0.12% |
| Los Angeles Department of Water & Power Water System Revenue 5%, due Jan 1, 2030 | 0.34% | 0.12% | 0.12% |
| Riverside County Transportation Commission 4%, due Jun 1, 2046 | 1.04% | 0.10% | 0.10% |
| PRG - POTRERO PROPERTIES 5%, due Jun 30, 2032 | 0.35% | 0.08% | 0.08% |
| Chabot-Las Positas Community College District 5.25%, due Aug 1, 2048 | 0.42% | 0.07% | 0.07% |
| UNIVERSITY OF CALIFORNIA 5%, due May 15, 2037 | 0.53% | 0.06% | 0.06% |
| Bay Area Toll Authority 5%, due Apr 1, 2042 | 0.49% | 0.06% | 0.06% |
| City of Los Angeles Department of Airports 5%, due May 15, 2048 | 0.41% | 0.06% | 0.06% |
| State of California 5.25%, due Aug 1, 2055 | 0.15% | 0.05% | 0.05% |
| Southern California Public Power Authority 3.7%, due Jul 1, 2040 | 0.64% | 0.05% | 0.05% |
| California State University 3.125%, due Nov 1, 2051 | 0.24% | 0.04% | 0.04% |
| Riverside County Public Financing Authority 5%, due Oct 1, 2035 | 0.15% | 0.04% | 0.04% |
| San Diego Public Facilities Financing Authority 5%, due Aug 1, 2042 | 0.67% | 0.04% | 0.04% |
| County of Sacramento CA Airport System Revenue 5.25%, due Jul 1, 2054 | 0.51% | 0.04% | 0.04% |
| Bay Area Toll Authority 5%, due Apr 1, 2043 | 0.23% | 0.04% | 0.04% |
| UNIVERSITY OF CALIFORNIA 5%, due May 15, 2053 | 0.68% | 0.03% | 0.03% |
| State of California Department of Water Resources 5%, due Dec 1, 2051 | 0.48% | 0.03% | 0.03% |
| San Joaquin Hills Transportation Corridor Agency 4%, due Jan 15, 2034 | 0.20% | 0.02% | 0.02% |
| Los Angeles Department of Water & Power Water System Revenue 5%, due Jul 1, 2027 | 0.17% | 0.02% | 0.02% |
| Sacramento Municipal Utility District 5%, due Nov 15, 2054 | 0.49% | 0.02% | 0.02% |
| County of Sacramento CA Airport System Revenue 5%, due Jul 1, 2034 | 0.02% | 0.03% | 0.02% |
| Yosemite Community College District, due Aug 1, 2031 | 0.15% | 0.01% | 0.01% |
| CHF-IRVINE LLC 5%, due May 15, 2040 | 0.52% | 0.01% | 0.01% |
| State of California 4%, due Mar 1, 2036 | 0.01% | 0.01% | 0.01% |
| California State University 4%, due Nov 1, 2043 | 0.43% | 0.00% | 0.00% |
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.