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
122 holdings in all 2 funds| Fund | MUB | MUST | Positions | Holdings |
|---|---|---|---|---|
| MUBiShares National Muni Bond ETF | — | 2% 122 shared |
7,603 | as of Oct 20, 2026issuer data |
| MUSTColumbia Multi-Sector Municipal Income ETF | 2% 122 shared | — | 645 | as of Jul 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
1.8% common weight| Holding | MUB | MUST | Smallest |
|---|---|---|---|
| OHIO ST WTR DEV AUTH WTR POLLU 5%, due Dec 1, 2035 | 0.10% | 0.24% | 0.10% |
| NEW JERSEY ST TRANSN TR FD AUTH, due Dec 15, 2032 | 0.07% | 0.30% | 0.07% |
| ILLINOIS ST TOLL HWY AUTH TOLL 5%, due Jan 1, 2036 | 0.06% | 0.13% | 0.06% |
| CHICAGO ILL O HARE INTL ARPT R 5%, due Jan 1, 2048 | 0.05% | 0.38% | 0.05% |
| NORTH TEX TWY AUTH REV 5%, due Jan 1, 2032 | 0.05% | 0.21% | 0.05% |
| SAN ANTONIO TEX ELEC & GAS REV 5%, due Feb 1, 2039 | 0.04% | 0.18% | 0.04% |
| NEW YORK ST TWY AUTH GEN REV 5%, due Jan 1, 2031 | 0.04% | 0.20% | 0.04% |
| NEW JERSEY ST TRANSN TR FD AUTH, due Dec 15, 2033 | 0.04% | 0.22% | 0.04% |
| MASSACHUSETTS ST DEV FIN AGY 5%, due Oct 1, 2038 | 0.04% | 0.28% | 0.04% |
| MASSACHUSETTS ST 5.5%, due Aug 1, 2030 | 0.04% | 0.09% | 0.04% |
| NEW JERSEY ST TRANSN TR FD AUTH, due Dec 15, 2039 | 0.04% | 0.29% | 0.04% |
| MASSACHUSETTS ST DEV FIN AGY R 5%, due Oct 1, 2036 | 0.03% | 0.19% | 0.03% |
| PENNSYLVANIA ST TPK COMMN TPK 5%, due Dec 1, 2038 | 0.03% | 0.09% | 0.03% |
| NEW JERSEY ST TRANSN TR FD AUT 5%, due Jun 15, 2032 | 0.03% | 0.18% | 0.03% |
| NORTH CAROLINA CAPITAL FACILITIES 5%, due Jan 1, 2036 | 0.03% | 0.19% | 0.03% |
| PENNSYLVANIA ST TPK COMMN TPK 5%, due Dec 1, 2033 | 0.03% | 0.09% | 0.03% |
| NEW JERSEY ST TRANSN TR FD AUT 5%, due Jun 15, 2033 | 0.03% | 0.18% | 0.03% |
| TEXAS TRANSN COMMN CENT TEX TP 5%, due Aug 15, 2038 | 0.03% | 0.27% | 0.03% |
| TRIBOROUGH BRIDGE & TUNNEL AUTH, due Nov 15, 2032 | 0.03% | 0.03% | 0.03% |
| TEXAS TRANSN COMMN CENT TEX TP 5%, due Aug 15, 2038 | 0.03% | 0.14% | 0.03% |
| NEW JERSEY ST TRANSN TR FD AUT 5%, due Jun 15, 2033 | 0.03% | 0.18% | 0.03% |
| DISTRICT COLUMBIA 5%, due Oct 15, 2032 | 0.03% | 0.04% | 0.03% |
| BROWARD CNTY FLA SCH BRD CTFS 5%, due Jul 1, 2035 | 0.03% | 0.24% | 0.03% |
| AMERICAN MUN PWR OHIO INC REV 5%, due Feb 15, 2035 | 0.02% | 0.18% | 0.02% |
| NEW JERSEY ST TRANSN TR FD AUTH, due Dec 15, 2037 | 0.02% | 0.21% | 0.02% |
| GREAT LAKES WTR AUTH MICH WTR 5%, due Jul 1, 2031 | 0.02% | 0.28% | 0.02% |
| NEW JERSEY ST TPK AUTH TPK REV 5%, due Jan 1, 2031 | 0.02% | 0.36% | 0.02% |
| OHIO ST WTR DEV AUTH REV 5%, due Dec 1, 2029 | 0.02% | 0.21% | 0.02% |
| METROPOLITAN TRANSN AUTH N Y R 5%, due Nov 15, 2034 | 0.02% | 0.19% | 0.02% |
| NEW JERSEY ST TRANSN TR FD AUTH, due Dec 15, 2034 | 0.02% | 0.10% | 0.02% |
| NEW JERSEY ECONOMIC DEV AUTH R 5%, due Nov 1, 2036 | 0.02% | 0.12% | 0.02% |
| MISSOURI JT MUN ELEC UTIL COMM 5%, due Dec 1, 2038 | 0.02% | 0.07% | 0.02% |
| DALLAS FORT WORTH TEX INTL ARP 4%, due Nov 1, 2034 | 0.02% | 0.21% | 0.02% |
| NEW JERSEY ST TRANSN TR FD AUT 4.25%, due Jun 15, 2040 | 0.02% | 0.17% | 0.02% |
| METROPOLITAN TRANSN AUTH N Y R 5%, due Nov 15, 2031 | 0.02% | 0.10% | 0.02% |
| E 470 PUB HWY AUTH COLO REV, due Sep 1, 2034 | 0.03% | 0.02% | 0.02% |
| PORT AUTH N Y & N J 4%, due Jul 15, 2038 | 0.02% | 0.17% | 0.02% |
| PHILADELPHIA PA WTR & WASTEWTR 5%, due Sep 1, 2030 | 0.02% | 0.16% | 0.02% |
| LOWER COLO RIV AUTH TEX REV 5%, due May 15, 2032 | 0.02% | 0.18% | 0.02% |
| ILLINOIS ST TOLL HWY AUTH TOLL 5%, due Jan 1, 2038 | 0.01% | 0.39% | 0.01% |
| NEW JERSEY ST TRANSN TR FD AUTH, due Dec 15, 2035 | 0.01% | 0.02% | 0.01% |
| MAINE HEALTH & HIGHER EDL FACS 5%, due Oct 1, 2038 | 0.01% | 0.12% | 0.01% |
| CHICAGO ILL MIDWAY ARPT REV 5%, due Jan 1, 2035 | 0.01% | 0.05% | 0.01% |
| NEW YORK ST TWY AUTH GEN REV J 4%, due Jan 1, 2038 | 0.01% | 0.03% | 0.01% |
| METROPOLITAN TRANSN AUTH N Y R 5%, due Nov 15, 2035 | 0.01% | 0.14% | 0.01% |
| KENTUCKY STATE PROPERTY AND BUILDI 5%, due Sep 1, 2033 | 0.01% | 0.19% | 0.01% |
| HAWAII ST 5%, due Jan 1, 2031 | 0.01% | 0.15% | 0.01% |
| NEW YORK ST DORM AUTH REVS NON 5%, due Oct 1, 2035 | 0.01% | 0.15% | 0.01% |
| GEORGIA ST RD & TWY AUTH REV 5%, due Jun 1, 2032 | 0.01% | 0.18% | 0.01% |
| NEW JERSEY ST TRANSN TR FD AUT 5%, due Jun 15, 2036 | 0.01% | 0.18% | 0.01% |
| ILLINOIS ST TOLL HWY AUTH TOLL 5%, due Jan 1, 2039 | 0.01% | 0.11% | 0.01% |
| MARYLAND ST 5%, due Aug 1, 2031 | 0.01% | 0.08% | 0.01% |
| PENNSYLVANIA ST TPK COMMN TPK 4%, due Dec 1, 2043 | 0.01% | 0.24% | 0.01% |
| SPRINGFIELD ILL ELEC REV 5%, due Mar 1, 2039 | 0.01% | 0.27% | 0.01% |
| PENNSYLVANIA ST TPK COMMN TPK 5%, due Dec 1, 2034 | 0.01% | 0.18% | 0.01% |
| CHICAGO ILL O HARE INTL ARPT 5%, due Jan 1, 2038 | 0.01% | 0.18% | 0.01% |
| DISTRICT COLUMBIA 5%, due Jun 1, 2029 | 0.01% | 0.23% | 0.01% |
| DALLAS FORT WORTH TEX INTL ARP 4%, due Nov 1, 2035 | 0.01% | 0.23% | 0.01% |
| NEW YORK N Y 5%, due Aug 1, 2033 | 0.01% | 0.23% | 0.01% |
| NEW YORK ST DORM AUTH REVS NON 3%, due Oct 1, 2031 | 0.01% | 0.13% | 0.01% |
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.