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
57 holdings in all 2 funds| Fund | MUB | TAFM | Positions | Holdings |
|---|---|---|---|---|
| MUBiShares National Muni Bond ETF | — | 1% 57 shared |
7,603 | as of Oct 20, 2026issuer data |
| TAFMAB Tax-Aware Intermediate Municipal ETF | 1% 57 shared | — | 564 | as of May 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
1.0% common weight| Holding | MUB | TAFM | Smallest |
|---|---|---|---|
| CHICAGO ILL TRAN AUTH SALES TA 5%, due Dec 1, 2049 | 0.09% | 0.59% | 0.09% |
| NORTH TEX TWY AUTH REV, due Jan 1, 2033 | 0.06% | 0.13% | 0.06% |
| METROPOLITAN TRANSN AUTH N Y R 5%, due Nov 15, 2039 | 0.05% | 0.06% | 0.05% |
| GRAND PARKWAY TRANSN CORP TEX 4%, due Oct 1, 2045 | 0.04% | 0.39% | 0.04% |
| LONG IS PWR AUTH N Y ELEC SYS 5%, due Sep 1, 2049 | 0.04% | 0.17% | 0.04% |
| CALIFORNIA ST 5%, due Oct 1, 2042 | 0.03% | 0.18% | 0.03% |
| WASHINGTON D C MET AREA TRAN A 5.25%, due Jul 15, 2053 | 0.03% | 0.38% | 0.03% |
| MIAMI-DADE CNTY FLA WTR & SWR 5%, due Oct 1, 2055 | 0.03% | 0.34% | 0.03% |
| TRIBOROUGH BRDG & TUNL AUTH N 5.25%, due May 15, 2064 | 0.03% | 0.17% | 0.03% |
| TRIBOROUGH BRDG & TUNL AUTH N 5.25%, due May 15, 2052 | 0.03% | 0.26% | 0.03% |
| CHICAGO ILL 5%, due Jan 1, 2034 | 0.03% | 0.17% | 0.03% |
| WASHINGTON D C MET AREA TRAN A 5.25%, due Jul 15, 2059 | 0.03% | 0.30% | 0.03% |
| CUYAHOGA CNTY OHIO 5.5%, due Dec 1, 2061 | 0.03% | 0.17% | 0.03% |
| NEW YORK N Y 5%, due Aug 1, 2046 | 0.02% | 0.17% | 0.02% |
| ILLINOIS ST 5.5%, due May 1, 2047 | 0.02% | 0.17% | 0.02% |
| COLORADO ST CTFS PARTN 6%, due Dec 15, 2041 | 0.02% | 0.28% | 0.02% |
| AMERICAN MUN PWR OHIO INC REV 5%, due Feb 15, 2038 | 0.02% | 0.18% | 0.02% |
| NORTH TEX TWY AUTH REV, due Jan 1, 2035 | 0.02% | 0.12% | 0.02% |
| NEW JERSEY ST TRANSN TR FD AUT 5%, due Jun 15, 2045 | 0.02% | 0.17% | 0.02% |
| ONONDAGA N Y CIVIC DEV CORP RE 5.5%, due Dec 1, 2056 | 0.02% | 0.18% | 0.02% |
| TRIBOROUGH BRDG & TUNL AUTH N 5%, due May 15, 2054 | 0.02% | 0.18% | 0.02% |
| TEXAS TRANSN COMMN CENT TEX TP 5%, due Aug 15, 2038 | 0.03% | 0.02% | 0.02% |
| MASSACHUSETTS ST 5%, due Apr 1, 2055 | 0.02% | 0.25% | 0.02% |
| JEFFERSON CNTY ALA SWR REV 5.25%, due Oct 1, 2044 | 0.02% | 0.02% | 0.02% |
| UNIVERSITY TEX UNIV REVS 5%, due Aug 15, 2049 | 0.02% | 0.18% | 0.02% |
| SAN FRANCISCO CALIF BAY AREA R 4%, due Aug 1, 2037 | 0.02% | 0.05% | 0.02% |
| ILLINOIS ST 5.5%, due May 1, 2039 | 0.01% | 0.19% | 0.01% |
| ILLINOIS ST SALES TAX REV 5%, due Jun 15, 2038 | 0.01% | 0.18% | 0.01% |
| NEW JERSEY ST TRANSN TR FD AUTH, due Dec 15, 2033 | 0.04% | 0.01% | 0.01% |
| PHILADELPHIA PA WTR & WASTEWTR 5%, due Nov 1, 2045 | 0.01% | 0.17% | 0.01% |
| ILLINOIS ST TOLL HWY AUTH TOLL 5%, due Jan 1, 2042 | 0.01% | 0.37% | 0.01% |
| NEW YORK N Y CITY TRANSITIONAL 5%, due Nov 1, 2037 | 0.01% | 0.19% | 0.01% |
| SOUTH CAROLINA PUBLIC SERVICE AUTH 5.25%, due Dec 1, 2056 | 0.01% | 0.17% | 0.01% |
| NEW YORK N Y CITY MUN WTR FIN 4%, due Jun 15, 2045 | 0.01% | 0.16% | 0.01% |
| LOS ANGELES CALIF WASTEWATER S 5%, due Jun 1, 2055 | 0.01% | 0.17% | 0.01% |
| PENNSYLVANIA ST 4%, due Aug 15, 2043 | 0.01% | 0.03% | 0.01% |
| NEW JERSEY ST TRANSN TR FD AUT 4.25%, due Jun 15, 2044 | 0.01% | 0.16% | 0.01% |
| TRIBOROUGH BRDG & TUNL AUTH N 5%, due Dec 1, 2046 | 0.01% | 0.09% | 0.01% |
| METROPOLITAN TRANSN AUTH N Y R 4.75%, due Nov 15, 2045 | 0.01% | 0.07% | 0.01% |
| NEW YORK CITY OF 5%, due Aug 1, 2035 | 0.01% | 0.28% | 0.01% |
| MUNICIPAL ELEC AUTH GA 5%, due Jul 1, 2052 | 0.01% | 0.33% | 0.01% |
| ALABAMA FEDERAL AID HIGHWAY FINANC 5%, due Sep 1, 2044 | 0.01% | 0.18% | 0.01% |
| NEW YORK ST DORM AUTH ST PERS 5%, due Mar 15, 2039 | 0.01% | 0.40% | 0.01% |
| LEWISVILLE TEX INDPT SCH DIST 5%, due Aug 15, 2039 | 0.01% | 0.18% | 0.01% |
| METROPOLITAN TRANSN AUTH N Y R 5%, due Nov 15, 2040 | 0.01% | 0.18% | 0.01% |
| SOUTH CAROLINA ST PUB SVCS AUT 5%, due Dec 1, 2044 | 0.01% | 0.09% | 0.01% |
| NEW JERSEY ST TRANSN TR FD AUT 5.25%, due Jun 15, 2050 | 0.01% | 0.33% | 0.01% |
| NEBRASKA PUB PWR DIST REV 5.25%, due Jan 1, 2055 | 0.00% | 0.17% | 0.00% |
| WASHINGTON D C MET AREA TRAN A 5%, due Jul 15, 2045 | 0.00% | 0.07% | 0.00% |
| NORTH TEX TWY AUTH REV, due Jan 1, 2034 | 0.00% | 0.13% | 0.00% |
| MUNICIPAL ELEC AUTH GA 5%, due Jan 1, 2063 | 0.00% | 0.11% | 0.00% |
| METROPOLITAN GOVT NASHVILLE & 4%, due Jan 1, 2044 | 0.00% | 0.24% | 0.00% |
| LOUISIANA ST GAS & FUELS TAX R 5%, due May 1, 2039 | 0.00% | 0.04% | 0.00% |
| SOUTH CAROLINA ST PUB SVCS AUT 4%, due Dec 1, 2035 | 0.00% | 0.17% | 0.00% |
| METROPOLITAN TRANSN AUTH N Y R, due Nov 15, 2033 | 0.00% | 0.05% | 0.00% |
| NEW YORK N Y 5%, due Aug 1, 2035 | 0.00% | 0.19% | 0.00% |
| PITTSBURGH PA WTR & SWR AUTH W 5%, due Sep 1, 2044 | 0.00% | 0.17% | 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.