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
25 holdings in all 2 funds| Fund | FSMB | JMST | Positions | Holdings |
|---|---|---|---|---|
| FSMBFirst Trust Short Duration Managed Municipal ETF | — | 2% 25 shared |
581 | as of Oct 20, 2026issuer data |
| JMSTJPMorgan Ultra-Short Municipal Income ETF | 2% 25 shared | — | 2,000 | as of Oct 21, 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
2.5% common weight| Holding | FSMB | JMST | Smallest |
|---|---|---|---|
| COLORADO ST HLTH FACS AUTH REV Variable rate, due 05/15/2062 | 0.32% | 0.35% | 0.32% |
| MARYLAND ST HLTH & HGR EDUCTNL FACS AUTH Variable rate, due 07/01/2055 | 0.31% | 0.56% | 0.31% |
| TEXAS ST MUNI GAS ACQUISITION & SPLY CORP IV Variable rate, due 01/01/2054 | 0.44% | 0.28% | 0.28% |
| CHANDLER AZ INDL DEV AUTH INDL DEV REV Variable rate, due 09/01/2052 | 0.39% | 0.24% | 0.24% |
| CALIFORNIA ST MUNI FIN AUTH SOL WST DISP Variable rate, due 03/01/2056 | 0.19% | 0.22% | 0.19% |
| COLORADO ST HLTH FACS AUTH REV Variable rate, due 11/15/2060 | 0.64% | 0.17% | 0.17% |
| MISSOURI ST HLTH & EDUCTNL FACS AUTH Variable rate, due 05/01/2052 | 0.16% | 0.23% | 0.16% |
| CALIFORNIA ST POLL CONTROL FIN AUTH Variable rate, due 07/01/2043 | 0.14% | 0.12% | 0.12% |
| ILLINOIS ST 5%, due 11/01/2029 | 0.37% | 0.11% | 0.11% |
| UNIV OF KANSAS KS HOSP AUTH HLTH FACS Variable rate, due 03/01/2055 | 0.12% | 0.11% | 0.11% |
| SOUTH CAROLINA ST JOBS-ECON DEV AUTH Variable rate, due 11/01/2055 | 0.20% | 0.09% | 0.09% |
| FLORIDA ST DEV FIN CORP SOL WST DISP REV Variable rate, due 09/01/2050 | 0.11% | 0.06% | 0.06% |
| HOUSTON TX ARPT SYS REVENUE N/C, 5%, due 07/15/2027 | 0.16% | 0.05% | 0.05% |
| ARIZONA ST INDL DEV AUTH NATL CHRT SCH 4%, due 11/01/2027 | 0.08% | 0.05% | 0.05% |
| OHIO ST AIR QUALITY DEV AUTH Variable rate, due 11/01/2039 | 0.74% | 0.05% | 0.05% |
| INDIANA ST FIN AUTH HLTH SYS REV Variable rate, due 10/01/2064 | 0.20% | 0.04% | 0.04% |
| CONNECTICUT ST N/C, 5%, due 12/01/2028 | 0.08% | 0.03% | 0.03% |
| MICHIGAN ST STRATEGIC FUND LTD OBLG REV Variable rate, due 10/01/2049 | 0.31% | 0.02% | 0.02% |
| MATAGORDA CNTY TX NAV DIST 1 N/C, 4.25%, due 05/01/2030 | 0.31% | 0.02% | 0.02% |
| LEE CNTY FL ARPT REVENUE Variable rate, due 10/01/2056 | 0.16% | 0.02% | 0.02% |
| TRIMBLE CNTY KY ENVRNMNTL FACS REV Variable rate, due 06/01/2054 | 0.25% | 0.01% | 0.01% |
| SAINT JOHN THE BAPTIST PARISH LA Variable rate, due 06/01/2037 | 0.62% | 0.01% | 0.01% |
| BARTOW CNTY GA DEV AUTH Variable rate, due 12/01/2032 | 0.04% | 0.01% | 0.01% |
| NORTH CAROLINA ST MED CARE COMMN Variable rate, due 06/01/2055 | 0.16% | 0.01% | 0.01% |
| BURKE CNTY GA DEV AUTH POLL CTRL REV Variable rate, due 11/01/2053 | 0.23% | 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.