# Portfolio overlap — IUSB vs PNIIX Comparing **iShares Core Universal USD Bond ETF** (2026-01-31) and **Bond Market Index Fund** (2026-02-28). - Shared positions: 3451 - iShares Core Universal USD Bond ETF covered by Bond Market Index Fund: 0.4076311213180508889667148166 - Bond Market Index Fund covered by iShares Core Universal USD Bond ETF: 0.4076311213180508889667148166 ## iShares Core Universal USD Bond ETF — top positions | Security | Weight | Shared | |----------|--------|--------| | Blackrock Liquidity TempCash Inst | 0.023010 | | | BlackRock Cash Funds: Treasury, SL Agency Shares | 0.007770 | | | US TREASURY N/B | 0.003831 | ✓ | | US TREASURY N/B | 0.003785 | ✓ | | US TREASURY N/B | 0.003777 | ✓ | | US TREASURY N/B | 0.003775 | ✓ | | US TREASURY N/B | 0.003711 | ✓ | | US TREASURY N/B | 0.003708 | ✓ | | US TREASURY N/B | 0.003548 | | | US TREASURY N/B | 0.003495 | ✓ | | US TREASURY N/B | 0.003432 | ✓ | | US TREASURY N/B | 0.003366 | ✓ | | FN MA4018 | 0.003335 | | | US TREASURY N/B | 0.003275 | ✓ | | US TREASURY N/B | 0.003210 | ✓ | | US TREASURY N/B | 0.003197 | ✓ | | US TREASURY N/B | 0.003052 | ✓ | | US TREASURY N/B | 0.002966 | | | US TREASURY N/B | 0.002932 | ✓ | | US TREASURY N/B | 0.002756 | | | US TREASURY N/B | 0.002756 | ✓ | | US TREASURY N/B | 0.002717 | ✓ | | US TREASURY N/B | 0.002668 | ✓ | | US TREASURY N/B | 0.002655 | ✓ | | US TREASURY N/B | 0.002640 | ✓ | | US TREASURY N/B | 0.002620 | ✓ | | US TREASURY N/B | 0.002614 | ✓ | | US TREASURY N/B | 0.002590 | ✓ | | US TREASURY N/B | 0.002588 | | | US TREASURY N/B | 0.002547 | ✓ | | US TREASURY N/B | 0.002547 | ✓ | | US TREASURY N/B | 0.002473 | ✓ | | US TREASURY N/B | 0.002452 | ✓ | | US TREASURY N/B | 0.002428 | | | US TREASURY N/B | 0.002422 | ✓ | | US TREASURY N/B | 0.002419 | ✓ | | US TREASURY N/B | 0.002404 | ✓ | | US TREASURY N/B | 0.002394 | ✓ | | US TREASURY N/B | 0.002390 | ✓ | | US TREASURY N/B | 0.002343 | | | US TREASURY N/B | 0.002333 | ✓ | | US TREASURY N/B | 0.002294 | ✓ | | US TREASURY N/B | 0.002260 | ✓ | | US TREASURY N/B | 0.002248 | ✓ | | US TREASURY N/B | 0.002241 | ✓ | | US TREASURY N/B | 0.002226 | ✓ | | US TREASURY N/B | 0.002211 | ✓ | | G2 MA7192 | 0.002184 | ✓ | | US TREASURY N/B | 0.002144 | ✓ | | US TREASURY N/B | 0.002127 | ✓ | ## 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 `0002071691-26-007327` (as of 2026-01-31) - N-PORT (fund B) — accession `0000898745-26-000541` (as of 2026-02-28) --- _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 _