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
173 holdings in all 2 funds| Fund | IUSB | MFSB | Positions | Holdings |
|---|---|---|---|---|
| IUSBiShares Trust iShares Core Universal USD Bond ETF | — | 3% 173 shared |
18,229 | as of Oct 14, 2026issuer data |
| MFSBMFS Active Core Plus Bond ETF | 3% 173 shared | — | 406 | 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
2.6% common weight| Holding | IUSB | MFSB | Smallest |
|---|---|---|---|
| TREASURY BOND 4.5%, due Nov 15, 2054 | 0.21% | 1.18% | 0.21% |
| TREASURY BOND 4.63%, due Nov 15, 2044 | 0.18% | 1.23% | 0.18% |
| TREASURY NOTE 4.13%, due Oct 31, 2029 | 0.17% | 3.22% | 0.17% |
| TREASURY NOTE 3.88%, due Jul 31, 2030 | 0.17% | 3.49% | 0.17% |
| TREASURY BOND 4.63%, due Nov 15, 2055 | 0.16% | 3.84% | 0.16% |
| TREASURY BOND 4.88%, due Aug 15, 2045 | 0.15% | 1.19% | 0.15% |
| TREASURY BOND 4.75%, due Aug 15, 2055 | 0.15% | 0.34% | 0.15% |
| TREASURY BOND 4.25%, due Feb 15, 2054 | 0.14% | 0.72% | 0.14% |
| FNMA 30YR UMBS, due Mar 1, 2052 | 0.13% | 0.25% | 0.13% |
| TREASURY BOND 4.5%, due Feb 15, 2044 | 0.13% | 0.42% | 0.13% |
| TREASURY BOND 4.63%, due Nov 15, 2045 | 0.12% | 7.75% | 0.12% |
| FHLMC 30YR UMBS SUPER, due Mar 1, 2052 | 0.07% | 0.29% | 0.07% |
| FNMA 30YR UMBS, due Dec 1, 2054 | 0.06% | 0.49% | 0.06% |
| FHLMC 30YR UMBS SUPER, due Oct 1, 2054 | 0.09% | 0.04% | 0.04% |
| FNMA 30YR UMBS, due Apr 1, 2052 | 0.07% | 0.04% | 0.04% |
| FHLMC 30YR UMBS SUPER, due May 1, 2052 | 0.03% | 0.29% | 0.03% |
| GNMA2 30YR, due Apr 20, 2052 | 0.02% | 0.10% | 0.02% |
| BOEING CO 5.8%, due May 1, 2050 | 0.01% | 0.04% | 0.01% |
| GNMA2 30YR, due Apr 20, 2052 | 0.01% | 0.07% | 0.01% |
| BANK OF AMERICA CORP MTN 5.29%, due Apr 25, 2034 | 0.01% | 0.08% | 0.01% |
| QUIKRETE HOLDINGS INC 144A, due Mar 1, 2032 | 0.01% | 0.35% | 0.01% |
| FHLMC 30YR UMBS SUPER, due May 1, 2052 | 0.01% | 0.15% | 0.01% |
| WELLS FARGO & COMPANY MTN 3.35%, due Mar 2, 2033 | 0.01% | 0.11% | 0.01% |
| MEXICO (UNITED MEXICAN STATES) (GO 6.88%, due May 13, 2037 | 0.01% | 0.15% | 0.01% |
| MEXICO (UNITED MEXICAN STATES) (GO 6%, due May 7, 2036 | 0.01% | 0.05% | 0.01% |
| HUB INTERNATIONAL LTD 144A, due Jun 15, 2030 | 0.01% | 0.34% | 0.01% |
| PETROLEOS MEXICANOS 5.95%, due Jan 28, 2031 | 0.01% | 0.03% | 0.01% |
| GOLDMAN SACHS GROUP INC/THE 3.1%, due Feb 24, 2033 | 0.01% | 0.45% | 0.01% |
| PANTHER ESCROW ISSUER LLC 144A, due Jun 1, 2031 | 0.01% | 0.33% | 0.01% |
| ORACLE CORPORATION 5.7%, due Feb 4, 2036 | 0.01% | 0.30% | 0.01% |
| JPMORGAN CHASE & CO 5.77%, due Apr 22, 2035 | 0.01% | 0.15% | 0.01% |
| MORGAN STANLEY MTN 5.32%, due Jul 19, 2035 | 0.01% | 0.11% | 0.01% |
| BEACH ACQUISITION BIDCO LLC 144A, due Jul 15, 2033 | 0.01% | 0.36% | 0.01% |
| MEXICO (UNITED MEXICAN STATES) (GO 6.63%, due Jan 29, 2038 | 0.01% | 0.12% | 0.01% |
| TRANSDIGM INC 144A, due May 31, 2033 | 0.01% | 0.26% | 0.01% |
| JPMORGAN CHASE & CO 4.95%, due Oct 22, 2035 | 0.01% | 0.53% | 0.01% |
| MORGAN STANLEY MTN 5.66%, due Apr 17, 2036 | 0.01% | 0.56% | 0.01% |
| SALESFORCE INC 5.55%, due Mar 15, 2036 | 0.01% | 0.46% | 0.01% |
| ORACLE CORPORATION 5.2%, due Sep 26, 2035 | 0.01% | 0.08% | 0.01% |
| PETSMART LLC 144A, due Sep 15, 2032 | 0.01% | 0.32% | 0.01% |
| LAS VEGAS SANDS CORP 5.63%, due Jun 15, 2028 | 0.01% | 0.18% | 0.01% |
| GOLDMAN SACHS GROUP INC/THE 2.65%, due Oct 21, 2032 | 0.01% | 0.09% | 0.01% |
| MORGAN STANLEY MTN 5.45%, due Jul 20, 2029 | 0.01% | 0.07% | 0.01% |
| COREWEAVE INC 144A, due Oct 1, 2031 | 0.01% | 0.30% | 0.01% |
| NTT FINANCE CORP 144A, due Jul 16, 2035 | 0.01% | 0.50% | 0.01% |
| WELLS FARGO & COMPANY MTN 4.89%, due Sep 15, 2036 | 0.01% | 0.41% | 0.01% |
| BOEING CO 6.53%, due May 1, 2034 | 0.01% | 0.55% | 0.01% |
| SOUTH AFRICA (REPUBLIC OF) RegS 7.1%, due Nov 19, 2036 | 0.01% | 0.20% | 0.01% |
| BANK OF AMERICA CORP 5.74%, due Feb 12, 2036 | 0.01% | 0.45% | 0.01% |
| TURKEY (REPUBLIC OF) 5.95%, due Jan 15, 2031 | 0.01% | 0.05% | 0.01% |
| ORACLE CORPORATION 5.95%, due Sep 26, 2055 | 0.01% | 0.02% | 0.01% |
| COLOMBIA (REPUBLIC OF) 7.75%, due Nov 7, 2036 | 0.01% | 0.29% | 0.01% |
| T-MOBILE USA INC 2.55%, due Feb 15, 2031 | 0.01% | 0.06% | 0.01% |
| PANAMA (REPUBLIC OF) 6.7%, due Jan 26, 2036 | 0.01% | 0.04% | 0.01% |
| CAPITAL ONE FINANCIAL CORPORATION 6.38%, due Jun 8, 2034 | 0.01% | 0.05% | 0.01% |
| PHILIP MORRIS INTERNATIONAL INC 5.38%, due Feb 15, 2033 | 0.01% | 0.18% | 0.01% |
| SALESFORCE INC 5.2%, due Mar 15, 2033 | 0.01% | 0.19% | 0.01% |
| BARCLAYS PLC 7.44%, due Nov 2, 2033 | 0.01% | 0.32% | 0.01% |
| CAPITAL ONE FINANCIAL CORPORATION 7.62%, due Oct 30, 2031 | 0.01% | 0.09% | 0.01% |
| SNAP INC 144A, due Mar 1, 2033 | 0.01% | 0.34% | 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.