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
336 holdings in all 2 funds| Fund | FMUN | MUB | Positions | Holdings |
|---|---|---|---|---|
| FMUNFidelity Systematic Municipal Bond Index ETF | — | 4% 336 shared |
1,232 | as of Nov 5, 2026issuer data |
| MUBiShares National Muni Bond ETF | 4% 336 shared | — | 7,927 | as of Nov 6, 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
4.1% common weight| Holding | FMUN | MUB | Smallest |
|---|---|---|---|
| OHIO ST UNIV GR 5% 06/01/35, due Jun 1, 2035 | 0.10% | 0.11% | 0.10% |
| UNIV CAL REV 5% 05/15/36, due May 15, 2036 | 0.24% | 0.09% | 0.09% |
| CA ST 5% 03/01/35, due Mar 1, 2035 | 0.12% | 0.07% | 0.07% |
| BATTERY PK REV 5% 11/1/2053, due Nov 1, 2053 | 0.08% | 0.07% | 0.07% |
| NYC NY 5.25% 04/01/54, due Apr 1, 2054 | 0.12% | 0.07% | 0.07% |
| SALT RIVER AZ 5% 01/01/32, due Jan 1, 2032 | 0.15% | 0.07% | 0.07% |
| NYC WTR 5% 06/15/52, due Jun 15, 2052 | 0.07% | 0.06% | 0.06% |
| NYC WTR 5% 06/15/49, due Jun 15, 2049 | 0.10% | 0.05% | 0.05% |
| CONN ST HEALTH 5% 07/01/35, due Jul 1, 2035 | 0.07% | 0.05% | 0.05% |
| NEW JERSEY ST E 07/01/64 MT, due Jul 1, 2064 | 0.06% | 0.04% | 0.04% |
| NEW YORK AUTH 5.25% 05/01/55, due May 1, 2055 | 0.15% | 0.04% | 0.04% |
| BATA CA 4% 04/01/38, due Apr 1, 2038 | 0.20% | 0.04% | 0.04% |
| NEW YORK ST DO 5% 03/15/51, due Mar 15, 2051 | 0.11% | 0.04% | 0.04% |
| CA ST 5% 10/01/29, due Oct 1, 2029 | 0.10% | 0.04% | 0.04% |
| LA CA USD 5% 07/01/31, due Jul 1, 2031 | 0.41% | 0.04% | 0.04% |
| NY STATE UR D 4% 03/15/49, due Mar 15, 2049 | 0.04% | 0.07% | 0.04% |
| GA ST 4% 12/01/33, due Dec 1, 2033 | 0.08% | 0.04% | 0.04% |
| MD ST 5% 06/01/38, due Jun 1, 2038 | 0.09% | 0.04% | 0.04% |
| NJ TRANSP 5.5% 06/15/54, due Jun 15, 2054 | 0.11% | 0.04% | 0.04% |
| LA CA DWAP 5% 07/01/38, due Jul 1, 2038 | 0.14% | 0.04% | 0.04% |
| TX WTR 4% 10/15/49, due Oct 15, 2049 | 0.16% | 0.03% | 0.03% |
| TRIBE_NY 0% 11/15/32, due Nov 15, 2032 | 0.13% | 0.03% | 0.03% |
| GRAND PARKWAY T 5% 10/1/48, due Oct 1, 2048 | 0.13% | 0.03% | 0.03% |
| NEW JERSEY ST E 5.25% 3/54, due Mar 1, 2054 | 0.11% | 0.03% | 0.03% |
| ALABA AL 010507 5.25% 07/01/47, due Jul 1, 2047 | 0.08% | 0.03% | 0.03% |
| NJ TRANSP 5% 6/15/55, due Jun 15, 2055 | 0.05% | 0.03% | 0.03% |
| NJ TRANSP 4% 06/15/50, due Jun 15, 2050 | 0.09% | 0.03% | 0.03% |
| OMAHA PPD 5% 2/1/42, due Feb 1, 2042 | 0.05% | 0.03% | 0.03% |
| TEXAS TRANSN CO 5% 04/01/30, due Apr 1, 2030 | 0.06% | 0.03% | 0.03% |
| NYC NY 5.25% 08/01/45, due Aug 1, 2045 | 0.08% | 0.03% | 0.03% |
| NJ TPK 5.25% 1/1/52, due Jan 1, 2052 | 0.14% | 0.03% | 0.03% |
| TX ST 5% 10/1/33, due Oct 1, 2033 | 0.03% | 0.06% | 0.03% |
| CA ST 5% 04/01/29, due Apr 1, 2029 | 0.08% | 0.03% | 0.03% |
| NJ TPK 5% 1/1/46, due Jan 1, 2046 | 0.12% | 0.03% | 0.03% |
| AUSTIN TX ISD 5% 08/01/41, due Aug 1, 2041 | 0.12% | 0.03% | 0.03% |
| MA PORT 3% 07/01/49, due Jul 1, 2049 | 0.03% | 0.03% | 0.03% |
| NJ TPK 5% 01/01/32, due Jan 1, 2032 | 0.11% | 0.03% | 0.03% |
| LA CA MTA SALES 5% 07/01/44, due Jul 1, 2044 | 0.10% | 0.03% | 0.03% |
| ILLINOIS FN RV 5% 04/01/34, due Apr 1, 2034 | 0.04% | 0.03% | 0.03% |
| CA PUB WKS 5% 04/01/42, due Apr 1, 2042 | 0.20% | 0.03% | 0.03% |
| PA TPK 4% 12/01/45, due Dec 1, 2045 | 0.09% | 0.02% | 0.02% |
| NORTH TX TOLL 08D 0% 1/1/36, due Jan 1, 2036 | 0.02% | 0.06% | 0.02% |
| TRIBOROUGH BRDG 5% 11/15/49, due Nov 15, 2049 | 0.02% | 0.05% | 0.02% |
| TRIBOROUGH BRD 5.25% 5/15/57, due May 15, 2057 | 0.26% | 0.02% | 0.02% |
| ILL ST TOLL 5% 01/01/44, due Jan 1, 2044 | 0.02% | 0.04% | 0.02% |
| NYC WTR 5% 06/15/51, due Jun 15, 2051 | 0.14% | 0.02% | 0.02% |
| DENVER CO SCH 1 5.25% 12/01/3, due Dec 1, 2038 | 0.10% | 0.02% | 0.02% |
| UNIV CAL REV 5% 05/15/29, due May 15, 2029 | 0.06% | 0.02% | 0.02% |
| NEW YORK ST DR 5% 10/1/38, due Oct 1, 2038 | 0.02% | 0.02% | 0.02% |
| NJ TRANSP 0% 12/15/34, due Dec 15, 2034 | 0.06% | 0.02% | 0.02% |
| NEW YORK AUTH 5% 11/01/34, due Nov 1, 2034 | 0.06% | 0.02% | 0.02% |
| SAC MUD CA ELEC 08/15/55 MT, due Aug 15, 2055 | 0.10% | 0.02% | 0.02% |
| DENVER CO ARPT 5% 11/15/47, due Nov 15, 2047 | 0.08% | 0.02% | 0.02% |
| PA ST 5% 04/01/32, due Apr 1, 2032 | 0.04% | 0.02% | 0.02% |
| NYS DORM PIT 3% 3/15/2049, due Mar 15, 2049 | 0.04% | 0.02% | 0.02% |
| NEW YORK AUTH 5.25% 5/1/48, due May 1, 2048 | 0.18% | 0.02% | 0.02% |
| CA ST 3% 11/1/50, due Nov 1, 2050 | 0.22% | 0.02% | 0.02% |
| NY STATE UR D 5% 3/15/63, due Mar 15, 2063 | 0.09% | 0.02% | 0.02% |
| IL ST 5% 11/01/28, due Nov 1, 2028 | 0.08% | 0.02% | 0.02% |
| NEW YORK ST URB 5% 03/15/54, due Mar 15, 2054 | 0.09% | 0.02% | 0.02% |
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.