# Portfolio overlap — FIFZX vs VBTLX

Comparing **Fidelity Series Bond Index Fund** (2026-02-28) and **VANGUARD TOTAL BOND MARKET INDEX FUND** (2026-03-31).

- Shared positions: 4347
- Fidelity Series Bond Index Fund covered by VANGUARD TOTAL BOND MARKET INDEX FUND: 0.3956562729686970665676446030
- VANGUARD TOTAL BOND MARKET INDEX FUND covered by Fidelity Series Bond Index Fund: 0.3956562729686970665676446030

## Fidelity Series Bond Index Fund — top positions

| Security | Weight | Shared |
|----------|--------|--------|
| US TREASURY N/B | 0.011257 | ✓ |
| US TREASURY N/B | 0.010648 |  |
| US TREASURY N/B | 0.009228 | ✓ |
| US TREASURY N/B | 0.008011 | ✓ |
| US TREASURY N/B | 0.007152 | ✓ |
| US TREASURY N/B | 0.006840 | ✓ |
| US TREASURY N/B | 0.006594 | ✓ |
| Fidelity Cash Central Fund | 0.006318 |  |
| US TREASURY N/B | 0.006218 | ✓ |
| US TREASURY N/B | 0.006205 | ✓ |
| US TREASURY N/B | 0.006178 | ✓ |
| Fidelity Securities Lending Cash Central Fund | 0.005920 |  |
| US TREASURY N/B | 0.005903 | ✓ |
| US TREASURY N/B | 0.005772 | ✓ |
| US TREASURY N/B | 0.005443 | ✓ |
| US TREASURY N/B | 0.005260 | ✓ |
| US TREASURY N/B | 0.005202 | ✓ |
| US TREASURY N/B | 0.004961 | ✓ |
| US TREASURY N/B | 0.004954 | ✓ |
| US TREASURY N/B | 0.004949 | ✓ |
| US TREASURY N/B | 0.004926 | ✓ |
| FR SD8121 | 0.004907 | ✓ |
| US TREASURY N/B | 0.004843 | ✓ |
| US TREASURY N/B | 0.004554 | ✓ |
| US TREASURY N/B | 0.004535 | ✓ |
| US TREASURY N/B | 0.004417 | ✓ |
| US TREASURY N/B | 0.004405 | ✓ |
| US TREASURY N/B | 0.004379 | ✓ |
| US TREASURY N/B | 0.004205 | ✓ |
| US TREASURY N/B | 0.004121 | ✓ |
| US TREASURY N/B | 0.003897 | ✓ |
| US TREASURY N/B | 0.003895 | ✓ |
| US TREASURY N/B | 0.003890 | ✓ |
| US TREASURY N/B | 0.003882 | ✓ |
| US TREASURY N/B | 0.003846 |  |
| US TREASURY N/B | 0.003830 | ✓ |
| US TREASURY N/B | 0.003818 | ✓ |
| US TREASURY N/B | 0.003748 | ✓ |
| US TREASURY N/B | 0.003696 | ✓ |
| US TREASURY N/B | 0.003667 | ✓ |
| US TREASURY N/B | 0.003631 | ✓ |
| US TREASURY N/B | 0.003625 | ✓ |
| US TREASURY N/B | 0.003611 | ✓ |
| US TREASURY N/B | 0.003608 | ✓ |
| US TREASURY N/B | 0.003580 | ✓ |
| US TREASURY N/B | 0.003496 | ✓ |
| US TREASURY N/B | 0.003480 | ✓ |
| US TREASURY N/B | 0.003479 | ✓ |
| G2SF 5 3/25 | 0.003405 |  |
| US TREASURY N/B | 0.003367 |  |

## VANGUARD TOTAL BOND MARKET INDEX FUND — top positions

| Security | Weight | Shared |
|----------|--------|--------|
| Vanguard Market Liquidity Fund | 0.010685 |  |
| US TREASURY N/B | 0.004799 | ✓ |
| US TREASURY N/B | 0.004211 | ✓ |
| US TREASURY N/B | 0.004208 | ✓ |
| US TREASURY N/B | 0.004193 |  |
| US TREASURY N/B | 0.004153 | ✓ |
| US TREASURY N/B | 0.004130 | ✓ |
| US TREASURY N/B | 0.004051 | ✓ |
| US TREASURY N/B | 0.003950 | ✓ |
| US TREASURY N/B | 0.003933 | ✓ |
| US TREASURY N/B | 0.003650 | ✓ |
| US TREASURY N/B | 0.003636 | ✓ |
| US TREASURY N/B | 0.003633 |  |
| US TREASURY N/B | 0.003529 | ✓ |
| US TREASURY N/B | 0.003528 | ✓ |
| US TREASURY N/B | 0.003509 |  |
| US TREASURY N/B | 0.003423 | ✓ |
| US TREASURY N/B | 0.003304 | ✓ |
| US TREASURY N/B | 0.003245 |  |
| US TREASURY N/B | 0.003239 | ✓ |
| US TREASURY N/B | 0.003235 | ✓ |
| US TREASURY N/B | 0.003207 | ✓ |
| US TREASURY N/B | 0.003188 |  |
| US TREASURY N/B | 0.003167 | ✓ |
| US TREASURY N/B | 0.003117 | ✓ |
| US TREASURY N/B | 0.003086 |  |
| US TREASURY N/B | 0.002885 |  |
| US TREASURY N/B | 0.002751 |  |
| US TREASURY N/B | 0.002746 | ✓ |
| US TREASURY N/B | 0.002725 | ✓ |
| US TREASURY N/B | 0.002602 | ✓ |
| US TREASURY N/B | 0.002428 | ✓ |
| US TREASURY N/B | 0.002421 | ✓ |
| US TREASURY N/B | 0.002415 | ✓ |
| US TREASURY N/B | 0.002412 | ✓ |
| US TREASURY N/B | 0.002401 | ✓ |
| US TREASURY N/B | 0.002394 | ✓ |
| US TREASURY N/B | 0.002392 | ✓ |
| US TREASURY N/B | 0.002360 | ✓ |
| US TREASURY N/B | 0.002358 | ✓ |
| US TREASURY N/B | 0.002330 | ✓ |
| US TREASURY N/B | 0.002312 | ✓ |
| US TREASURY N/B | 0.002295 | ✓ |
| US TREASURY N/B | 0.002286 | ✓ |
| US TREASURY N/B | 0.002284 |  |
| US TREASURY N/B | 0.002276 |  |
| US TREASURY N/B | 0.002272 | ✓ |
| US TREASURY N/B | 0.002256 | ✓ |
| US TREASURY N/B | 0.002244 | ✓ |
| US TREASURY N/B | 0.002240 | ✓ |


## Sources

- N-PORT (fund A) — accession `0000035402-26-002627` (as of 2026-02-28)
  <https://www.sec.gov/Archives/edgar/data/35315/000003540226002627/0000035402-26-002627-index.htm>
- N-PORT (fund B) — accession `0000794105-26-000185` (as of 2026-03-31)
  <https://www.sec.gov/Archives/edgar/data/794105/000079410526000185/0000794105-26-000185-index.htm>

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