# Portfolio overlap — VBMPX vs PNIIX

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

- Shared positions: 3309
- VANGUARD TOTAL BOND MARKET INDEX FUND covered by Bond Market Index Fund: 0.4933371102784411965408468446
- Bond Market Index Fund covered by VANGUARD TOTAL BOND MARKET INDEX FUND: 0.4933371102784411965408468445

## 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 | ✓ |

## Bond Market Index Fund — top positions

| Security | Weight | Shared |
|----------|--------|--------|
| Principal Government Money Market Fund - Class R-6 | 0.023280 |  |
| US TREASURY N/B | 0.007821 | ✓ |
| US TREASURY N/B | 0.006144 | ✓ |
| US TREASURY N/B | 0.005987 | ✓ |
| US TREASURY N/B | 0.005072 |  |
| US TREASURY N/B | 0.004824 | ✓ |
| US TREASURY N/B | 0.004730 | ✓ |
| iShares Trust IBOXX USD INVST GRADE CORP | 0.004683 |  |
| US TREASURY N/B | 0.004647 | ✓ |
| US TREASURY N/B | 0.004572 | ✓ |
| US TREASURY N/B | 0.004485 | ✓ |
| US TREASURY N/B | 0.004398 | ✓ |
| US TREASURY N/B | 0.004168 | ✓ |
| US TREASURY N/B | 0.004124 | ✓ |
| US TREASURY N/B | 0.004020 | ✓ |
| US TREASURY N/B | 0.003967 | ✓ |
| US TREASURY N/B | 0.003955 | ✓ |
| US TREASURY N/B | 0.003951 | ✓ |
| US TREASURY N/B | 0.003905 | ✓ |
| US TREASURY N/B | 0.003879 | ✓ |
| US TREASURY N/B | 0.003833 | ✓ |
| FN MA4208 | 0.003780 | ✓ |
| US TREASURY N/B | 0.003775 | ✓ |
| US TREASURY N/B | 0.003764 | ✓ |
| US TREASURY N/B | 0.003637 | ✓ |
| US TREASURY N/B | 0.003580 | ✓ |
| US TREASURY N/B | 0.003503 | ✓ |
| US TREASURY N/B | 0.003409 | ✓ |
| US TREASURY N/B | 0.003395 | ✓ |
| US TREASURY N/B | 0.003387 | ✓ |
| US TREASURY N/B | 0.003320 | ✓ |
| G2 MA7768 | 0.003293 | ✓ |
| US TREASURY N/B | 0.003290 | ✓ |
| US TREASURY N/B | 0.003288 | ✓ |
| US TREASURY N/B | 0.003280 | ✓ |
| US TREASURY N/B | 0.003257 | ✓ |
| US TREASURY N/B | 0.003223 | ✓ |
| US TREASURY N/B | 0.003220 | ✓ |
| US TREASURY N/B | 0.003192 | ✓ |
| US TREASURY N/B | 0.003190 | ✓ |
| US TREASURY N/B | 0.003164 | ✓ |
| US TREASURY N/B | 0.003158 | ✓ |
| G2 MA7472 | 0.003095 | ✓ |
| Freddie Mac Pool | 0.003094 |  |
| US TREASURY N/B | 0.003006 | ✓ |
| Freddie Mac Pool | 0.002996 |  |
| Fannie Mae Pool | 0.002968 |  |
| UMBS | 0.002943 |  |
| US TREASURY N/B | 0.002940 | ✓ |
| US TREASURY N/B | 0.002929 | ✓ |


## Sources

- N-PORT (fund A) — accession `0000794105-26-000185` (as of 2026-03-31)
  <https://www.sec.gov/Archives/edgar/data/794105/000079410526000185/0000794105-26-000185-index.htm>
- N-PORT (fund B) — accession `0000898745-26-000541` (as of 2026-02-28)
  <https://www.sec.gov/Archives/edgar/data/898745/000089874526000541/0000898745-26-000541-index.htm>

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