# Portfolio overlap — RBFEX vs NOBOX

Comparing **Bond Fund of America** (2026-03-31) and **Bond Index Fund** (2026-03-31).

- Shared positions: 650
- Bond Fund of America covered by Bond Index Fund: 0.2038648513750367580661374798
- Bond Index Fund covered by Bond Fund of America: 0.2038648513750367580661374798

## Bond Fund of America — top positions

| Security | Weight | Shared |
|----------|--------|--------|
| CAPITAL GROUP CENTRAL CASH FUND | 0.038352 |  |
| US TREASURY N/B | 0.013990 | ✓ |
| US TREASURY N/B | 0.013490 | ✓ |
| US TREASURY N/B | 0.012390 | ✓ |
| US TREASURY N/B | 0.012069 |  |
| US TREASURY N/B | 0.010204 | ✓ |
| US TREASURY N/B | 0.008753 | ✓ |
| Uniform Mortgage-Backed Security, TBA | 0.008732 |  |
| US TREASURY N/B | 0.008088 | ✓ |
| US TREASURY N/B | 0.007513 | ✓ |
| US TREASURY N/B | 0.007294 | ✓ |
| FNCL 2 5/26 | 0.006139 |  |
| US TREASURY N/B | 0.006124 | ✓ |
| US TREASURY N/B | 0.005948 | ✓ |
| Eagle Funding LuxCo S.a.r.l. | 0.005649 |  |
| US TREASURY N/B | 0.005532 | ✓ |
| US TREASURY N/B | 0.005224 | ✓ |
| US TREASURY N/B | 0.004910 | ✓ |
| US TREASURY N/B | 0.004853 | ✓ |
| U.S. Treasury Inflation-Protected Indexed Bonds | 0.004645 |  |
| US TREASURY N/B | 0.004637 | ✓ |
| US TREASURY N/B | 0.004614 | ✓ |
| FNCL 6 4/26 | 0.004569 | ✓ |
| US TREASURY N/B | 0.004231 | ✓ |
| US TREASURY N/B | 0.004187 | ✓ |
| US TREASURY N/B | 0.004149 | ✓ |
| US TREASURY N/B | 0.004137 |  |
| US TREASURY N/B | 0.004017 | ✓ |
| US TREASURY N/B | 0.003996 | ✓ |
| U.S. Treasury Notes | 0.003699 |  |
| FNCL 2.5 4/26 | 0.003585 | ✓ |
| US TREASURY N/B | 0.003434 | ✓ |
| US TREASURY N/B | 0.003408 | ✓ |
| US TREASURY N/B | 0.003407 | ✓ |
| US TREASURY N/B | 0.003051 | ✓ |
| US TREASURY N/B | 0.003033 | ✓ |
| USRE 2021-1 A1 | 0.002968 |  |
| FR SD8213 | 0.002953 | ✓ |
| US TREASURY N/B | 0.002939 |  |
| US TREASURY N/B | 0.002895 | ✓ |
| US TREASURY N/B | 0.002847 | ✓ |
| US TREASURY N/B | 0.002801 | ✓ |
| US TREASURY N/B | 0.002751 | ✓ |
| US TREASURY N/B | 0.002730 | ✓ |
| FNCL 5.5 4/26 | 0.002664 | ✓ |
| US TREASURY N/B | 0.002642 |  |
| US TREASURY N/B | 0.002617 | ✓ |
| IL ST TXB-PENSION | 0.002592 | ✓ |
| US TREASURY N/B | 0.002537 | ✓ |
| US TREASURY N/B | 0.002457 | ✓ |

## Bond Index Fund — top positions

| Security | Weight | Shared |
|----------|--------|--------|
| Northern Institutional Funds GOVT PTFL | 0.038771 |  |
| Northern Institutional Liquid Asset Portfolio | 0.008077 |  |
| US TREASURY N/B | 0.005801 | ✓ |
| US TREASURY N/B | 0.004817 | ✓ |
| US TREASURY N/B | 0.004713 | ✓ |
| US TREASURY N/B | 0.004631 | ✓ |
| US TREASURY N/B | 0.003864 | ✓ |
| US TREASURY N/B | 0.003835 | ✓ |
| US TREASURY N/B | 0.003770 | ✓ |
| US TREASURY N/B | 0.003537 | ✓ |
| US TREASURY N/B | 0.003459 | ✓ |
| US TREASURY N/B | 0.003372 | ✓ |
| US TREASURY N/B | 0.003290 |  |
| FNCL 6 4/26 | 0.003286 | ✓ |
| US TREASURY N/B | 0.003263 | ✓ |
| US TREASURY N/B | 0.003258 | ✓ |
| FNCL 5.5 4/26 | 0.003239 | ✓ |
| US TREASURY N/B | 0.003236 | ✓ |
| US TREASURY N/B | 0.003226 | ✓ |
| US TREASURY N/B | 0.003205 | ✓ |
| US TREASURY N/B | 0.003180 |  |
| US TREASURY N/B | 0.003165 |  |
| US TREASURY N/B | 0.003159 |  |
| US TREASURY N/B | 0.003071 |  |
| US TREASURY N/B | 0.002875 | ✓ |
| FN MA4355 | 0.002849 |  |
| US TREASURY N/B | 0.002826 |  |
| US TREASURY N/B | 0.002800 |  |
| US TREASURY N/B | 0.002798 | ✓ |
| US TREASURY N/B | 0.002796 | ✓ |
| US TREASURY N/B | 0.002637 | ✓ |
| US TREASURY N/B | 0.002580 |  |
| US TREASURY N/B | 0.002544 | ✓ |
| FNCL 6.5 4/26 | 0.002535 | ✓ |
| US TREASURY N/B | 0.002532 | ✓ |
| US TREASURY N/B | 0.002465 | ✓ |
| US TREASURY N/B | 0.002456 | ✓ |
| US TREASURY N/B | 0.002260 |  |
| US TREASURY N/B | 0.002246 | ✓ |
| US TREASURY N/B | 0.002240 | ✓ |
| US TREASURY N/B | 0.002239 | ✓ |
| US TREASURY N/B | 0.002239 | ✓ |
| FN MA4493 | 0.002215 | ✓ |
| US TREASURY N/B | 0.002214 | ✓ |
| US TREASURY N/B | 0.002205 | ✓ |
| FANNIE MAE POOL 2.50% | 0.002141 |  |
| US TREASURY N/B | 0.002119 | ✓ |
| US TREASURY N/B | 0.002116 | ✓ |
| US TREASURY N/B | 0.002088 | ✓ |
| US TREASURY N/B | 0.002064 | ✓ |


## Sources

- N-PORT (fund A) — accession `0001193125-26-245289` (as of 2026-03-31)
  <https://www.sec.gov/Archives/edgar/data/13075/000119312526245289/0001193125-26-245289-index.htm>
- N-PORT (fund B) — accession `0002066578-26-001906` (as of 2026-03-31)
  <https://www.sec.gov/Archives/edgar/data/916620/000206657826001906/0002066578-26-001906-index.htm>

---

_Informational only — not investment advice. FundWatcher presents publicly available data and makes no recommendation to buy or sell any security. Verify all figures against the source filing before relying on them._

_Data sourced from U.S. SEC EDGAR filings (Forms N-PORT, N-CEN, and prospectus Risk/Return summaries). FundWatcher is not affiliated with the SEC._

_Use of this data is subject to the FundWatcher Terms of Service. Information may be used only for personal, non-commercial research and may not be redistributed. See <https://fundwatcher.app/terms/>_