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
46 holdings in all 2 funds| Fund | JMUB | MFSM | Positions | Holdings |
|---|---|---|---|---|
| JMUBJPMorgan Municipal ETF | — | 3% 46 shared |
2,210 | as of Nov 6, 2026issuer data |
| MFSMMFS Active Intermediate Muni Bond ETF | 3% 46 shared | — | 418 | as of Aug 31, 2026SEC filing |
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
3.4% common weight| Holding | JMUB | MFSM | Smallest |
|---|---|---|---|
| BLACK BELT 5% 12/34, due Dec 1, 2034 | 0.58% | 0.39% | 0.39% |
| BLACK BELT VAR 03/55, due Mar 1, 2055 | 0.46% | 0.25% | 0.25% |
| MAIN STR ENERGY 5% 12/33, due Dec 1, 2033 | 0.22% | 0.25% | 0.22% |
| CALIFORNIA VAR 02/55, due Feb 1, 2055 | 0.20% | 0.51% | 0.20% |
| CALIFORNIA CMNTY 5% 06/36, due Jun 1, 2036 | 0.22% | 0.18% | 0.18% |
| BLACK BELT 5% 10/33, due Oct 1, 2033 | 0.16% | 0.42% | 0.16% |
| MAIN STR ENERGY 5% 10/33, due Oct 1, 2033 | 0.14% | 0.16% | 0.14% |
| HOUSTON TEX 5.25% 07/34, due Jul 15, 2034 | 0.13% | 0.15% | 0.13% |
| SOUTH 3.95% 04/33, due Apr 1, 2033 | 0.12% | 0.11% | 0.11% |
| CALIFORNIA 5.25% 02/36, due Feb 1, 2036 | 0.50% | 0.10% | 0.10% |
| PEFA INC IOWA 5% 04/35, due Apr 1, 2035 | 0.12% | 0.10% | 0.10% |
| BALDWIN CNTY VAR 06/55, due Jun 1, 2055 | 0.24% | 0.10% | 0.10% |
| NORTH 6.25% 07/57, due Jul 1, 2057 | 0.10% | 0.14% | 0.10% |
| WHITING IND VAR 12/44, due Dec 1, 2044 | 0.11% | 0.10% | 0.10% |
| SOUTH CAROLINA VAR 03/62, due Mar 1, 2062 | 0.10% | 0.10% | 0.10% |
| GRAND PARKWAY 5% 10/43, due Oct 1, 2043 | 0.09% | 0.29% | 0.09% |
| SANTA FE CNTY N VAR 12/49, due Dec 10, 2049 | 0.09% | 0.48% | 0.09% |
| NATIONAL FIN VAR 04/43, due Apr 20, 2043 | 0.08% | 0.28% | 0.08% |
| CALIFORNIA CMNTY 5% 07/35, due Jul 1, 2035 | 0.06% | 0.10% | 0.06% |
| TEXAS MUN GAS VAR 01/55, due Jan 1, 2055 | 0.06% | 0.25% | 0.06% |
| MICHIGAN ST 5% 12/43, due Dec 31, 2043 | 0.05% | 0.48% | 0.05% |
| SOUTHEAST ENERGY 5% 11/35, due Nov 1, 2035 | 0.05% | 0.24% | 0.05% |
| IDAHO HEALTH VAR 03/60, due Mar 1, 2060 | 0.05% | 0.07% | 0.05% |
| PAULDING CNTY GA 5% 04/36, due Apr 1, 2036 | 0.05% | 0.53% | 0.05% |
| DISTRICT 5% 03/28, due Mar 1, 2028 | 0.04% | 0.25% | 0.04% |
| ILLINOIS FIN VAR 12/43, due Dec 1, 2043 | 0.04% | 0.20% | 0.04% |
| ARKANSAS ST DEV VAR 07/57, due Jul 1, 2057 | 0.04% | 0.10% | 0.04% |
| PUERTO RICO 5.625% 07/27, due Jul 1, 2027 | 0.04% | 0.15% | 0.04% |
| HAWAII ST ARPTS 5% 07/43, due Jul 1, 2043 | 0.04% | 0.20% | 0.04% |
| NEW YORK TRANSN 6% 04/35, due Apr 1, 2035 | 0.04% | 0.26% | 0.04% |
| MAIN STR NAT VAR 05/54, due May 1, 2054 | 0.03% | 0.21% | 0.03% |
| BLACK BELT VAR 12/52, due Dec 1, 2052 | 0.03% | 0.16% | 0.03% |
| BALDWIN CNTY VAR 03/56, due Mar 1, 2056 | 0.03% | 0.10% | 0.03% |
| BUCKEYE OHIO TOB 5% 06/33, due Jun 1, 2033 | 0.02% | 0.26% | 0.02% |
| MAINE FIN AUTH 5% 08/35, due Aug 1, 2035 | 0.02% | 0.10% | 0.02% |
| NEW YORK 5.5% 06/42, due Jun 30, 2042 | 0.02% | 0.24% | 0.02% |
| MINNESOTA ST 5.75% 07/53, due Jul 1, 2053 | 0.02% | 0.18% | 0.02% |
| ORLANDO FLA 5% 09/32, due Sep 1, 2032 | 0.02% | 0.52% | 0.02% |
| RENSSELAER CNTY 5% 04/38, due Apr 1, 2038 | 0.02% | 0.52% | 0.02% |
| ATLANTA GA VAR 02/29, due Feb 1, 2029 | 0.02% | 0.10% | 0.02% |
| NEW YORK TRANSN 5% 01/29, due Jan 1, 2029 | 0.01% | 0.12% | 0.01% |
| NEW YORK N Y 4.375% 12/31, due Dec 15, 2031 | 0.01% | 0.10% | 0.01% |
| NEW HOPE 5.25% 01/40, due Jan 1, 2040 | 0.01% | 0.13% | 0.01% |
| MEDICAL UNIV 5.25% 05/39, due May 15, 2039 | 0.00% | 0.10% | 0.00% |
| PUBLIC FIN 5.25% 06/35, due Jun 15, 2035 | 0.00% | 0.10% | 0.00% |
| PUERTO RICO 4.329% 07/40, due Jul 1, 2040 | 0.00% | 0.24% | 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.