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
22 holdings in all 2 funds| Fund | BILS | SHV | Positions | Holdings |
|---|---|---|---|---|
| BILSState Street SPDR Bloomberg 3-12 Month T-Bill ETF | — | 33% 22 shared |
23 | as of Oct 20, 2026issuer data |
| SHViShares Trust iShares 0-1 Year Treasury Bond ETF | 33% 22 shared | — | 66 | as of Oct 20, 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
33.1% common weight| Holding | BILS | SHV | Smallest |
|---|---|---|---|
| TREASURY BILL 01/27 0.00000, due Jan 14, 2027 | 4.63% | 4.98% | 4.63% |
| TREASURY BILL 01/27 0.00000, due Jan 7, 2027 | 4.63% | 3.31% | 3.31% |
| TREASURY BILL 03/27 0.00000, due Mar 25, 2027 | 4.41% | 3.07% | 3.07% |
| TREASURY BILL 01/27 0.00000, due Jan 12, 2027 | 3.81% | 3.05% | 3.05% |
| TREASURY BILL 04/27 0.00000, due Apr 1, 2027 | 4.65% | 2.50% | 2.50% |
| TREASURY BILL 04/27 0.00000, due Apr 15, 2027 | 2.45% | 2.83% | 2.45% |
| TREASURY BILL 01/27 0.00000, due Jan 21, 2027 | 7.32% | 2.36% | 2.36% |
| TREASURY BILL 01/27 0.00000, due Jan 19, 2027 | 4.06% | 1.84% | 1.84% |
| TREASURY BILL 01/27 0.00000, due Jan 26, 2027 | 4.06% | 1.84% | 1.84% |
| TREASURY BILL 03/27 0.00000, due Mar 4, 2027 | 4.42% | 1.66% | 1.66% |
| TREASURY BILL 03/27 0.00000, due Mar 11, 2027 | 4.29% | 1.16% | 1.16% |
| TREASURY BILL 02/27 0.00000, due Feb 4, 2027 | 4.46% | 1.06% | 1.06% |
| TREASURY BILL 02/27 0.00000, due Feb 11, 2027 | 4.61% | 0.87% | 0.87% |
| TREASURY BILL 02/27 0.00000, due Feb 18, 2027 | 7.15% | 0.52% | 0.52% |
| TREASURY BILL 03/27 0.00000, due Mar 18, 2027 | 7.12% | 0.52% | 0.52% |
| TREASURY BILL 06/27 0.00000, due Jun 10, 2027 | 2.85% | 0.49% | 0.49% |
| TREASURY BILL 05/27 0.00000, due May 13, 2027 | 2.88% | 0.46% | 0.46% |
| TREASURY BILL 01/27 0.00000, due Jan 28, 2027 | 4.62% | 0.27% | 0.27% |
| TREASURY BILL 02/27 0.00000, due Feb 25, 2027 | 4.60% | 0.26% | 0.26% |
| TREASURY BILL 08/27 0.00000, due Aug 5, 2027 | 2.99% | 0.24% | 0.24% |
| TREASURY BILL 07/27 0.00000, due Jul 8, 2027 | 2.99% | 0.24% | 0.24% |
| TREASURY BILL 01/27 0.00000, due Jan 5, 2027 | 4.07% | 0.24% | 0.24% |
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.