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
35 holdings in all 2 funds| Fund | SUB | TAFI | Positions | Holdings |
|---|---|---|---|---|
| SUBiShares Short-Term National Muni Bond ETF | — | 1% 35 shared |
3,097 | as of Nov 6, 2026issuer data |
| TAFIAB Tax-Aware Short Duration Municipal ETF | 1% 35 shared | — | 692 | 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
1.1% common weight| Holding | SUB | TAFI | Smallest |
|---|---|---|---|
| ILLINOIS ST 5%, due Nov 1, 2027 | 0.14% | 0.19% | 0.14% |
| NEW JERSEY ST TRANSN TR FD AUTH, due Dec 15, 2027 | 0.12% | 0.10% | 0.10% |
| ILLINOIS ST 5.5%, due May 1, 2030 | 0.08% | 0.15% | 0.08% |
| MASSACHUSETTS ST 5.5%, due Aug 1, 2030 | 0.18% | 0.08% | 0.08% |
| DALLAS TEX INDPT SCH DIST 5%, due Feb 15, 2030 | 0.08% | 0.08% | 0.08% |
| MUNICIPAL ELEC AUTH GA 5%, due Jan 1, 2028 | 0.07% | 0.14% | 0.07% |
| NEW JERSEY ST TRANSN TR FD AUT 5%, due Jun 15, 2030 | 0.05% | 0.39% | 0.05% |
| PENNSYLVANIA ST 5%, due Aug 15, 2027 | 0.05% | 0.15% | 0.05% |
| SAN ANTONIO TEX ELEC & GAS REV 3%, due Dec 1, 2029 | 0.04% | 0.13% | 0.04% |
| NEW JERSEY ST TRANSN TR FD AUT 5%, due Jun 15, 2028 | 0.04% | 0.15% | 0.04% |
| WASHINGTON ST 5%, due Aug 1, 2030 | 0.03% | 0.07% | 0.03% |
| GARDEN ST PRESERVATION TR NJ 5.75%, due Nov 1, 2028 | 0.03% | 0.15% | 0.03% |
| INTERMOUNTAIN PWR AGY UTAH PWR 5%, due Jul 1, 2027 | 0.03% | 0.08% | 0.03% |
| NEW JERSEY ST TRANSN TR FD AUT 5%, due Jun 15, 2028 | 0.03% | 0.08% | 0.03% |
| SAN ANTONIO TX 3.5%, due Feb 1, 2056 | 0.02% | 0.11% | 0.02% |
| ILLINOIS ST SALES TAX REV 5%, due Jun 15, 2030 | 0.02% | 0.14% | 0.02% |
| ILLINOIS ST 5%, due May 1, 2028 | 0.02% | 0.09% | 0.02% |
| MILWAUKEE WIS 5%, due Apr 1, 2027 | 0.02% | 0.17% | 0.02% |
| NEW JERSEY ST TRANSN TR FD AUT, due Dec 15, 2026 | 0.02% | 0.09% | 0.02% |
| LOS ANGELES CALIF DEPT WTR & P 5%, due Jul 1, 2027 | 0.02% | 0.15% | 0.02% |
| NEW YORK CITY OF 5%, due Aug 1, 2030 | 0.02% | 0.08% | 0.02% |
| UTAH TRAN AUTH SALES TAX REV 5%, due Jun 15, 2031 | 0.02% | 0.08% | 0.02% |
| ILLINOIS ST 5%, due Oct 1, 2029 | 0.01% | 0.15% | 0.01% |
| CHICAGO ILL TRAN AUTH SALES TA 5%, due Dec 1, 2029 | 0.01% | 0.14% | 0.01% |
| NEW JERSEY ST TRANSN TR FD AUT 5%, due Jun 15, 2027 | 0.01% | 0.27% | 0.01% |
| HARRIS CNTY TEX MET TRAN AUTH 5%, due Nov 1, 2029 | 0.01% | 0.07% | 0.01% |
| COOK CNTY ILL 5%, due Nov 15, 2030 | 0.01% | 0.23% | 0.01% |
| KENTUCKY ST MUN PWR AGY PWR SY 5%, due Sep 1, 2030 | 0.01% | 0.20% | 0.01% |
| AQUARION WATER AUTHORITY CT 5.25%, due Feb 1, 2029 | 0.01% | 0.05% | 0.01% |
| KENTUCKY ST TPK AUTH ECONOMIC 5%, due Jul 1, 2027 | 0.01% | 0.07% | 0.01% |
| NEW JERSEY ECONOMIC DEV AUTH R 5.25%, due Jun 15, 2027 | 0.01% | 0.10% | 0.01% |
| SOUTH CAROLINA PUBLIC SERVICE AUTH 5%, due Dec 1, 2029 | 0.01% | 0.39% | 0.01% |
| ILLINOIS MUN ELEC AGY PWR SUPP 5%, due Feb 1, 2027 | 0.01% | 0.07% | 0.01% |
| LOS ANGELES CALIF DEPT WTR & P 5%, due Jul 1, 2028 | 0.01% | 0.34% | 0.01% |
| NEW YORK CITY OF 5%, due Feb 1, 2028 | 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.