# Portfolio overlap — FIFZX vs SWAGX Comparing **Fidelity Series Bond Index Fund** (2026-02-28) and **Schwab U.S. Aggregate Bond Index Fund** (2026-02-28). - Shared positions: 3977 - Fidelity Series Bond Index Fund covered by Schwab U.S. Aggregate Bond Index Fund: 0.3925798826426430275020615352 - Schwab U.S. Aggregate Bond Index Fund covered by Fidelity Series Bond Index Fund: 0.3925798826426430275020615353 ## 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 | | ## Schwab U.S. Aggregate Bond Index Fund — top positions | Security | Weight | Shared | |----------|--------|--------| | State Street Navigator Securities Lending Portfolio II | 0.020407 | | | US TREASURY N/B | 0.003986 | ✓ | | US TREASURY N/B | 0.003889 | ✓ | | US TREASURY N/B | 0.003875 | ✓ | | US TREASURY N/B | 0.003863 | ✓ | | US TREASURY N/B | 0.003859 | | | US TREASURY N/B | 0.003820 | ✓ | | US TREASURY N/B | 0.003771 | ✓ | | US TREASURY N/B | 0.003725 | ✓ | | US TREASURY N/B | 0.003660 | ✓ | | US TREASURY N/B | 0.003642 | ✓ | | US TREASURY N/B | 0.003608 | ✓ | | US TREASURY N/B | 0.003495 | ✓ | | US TREASURY N/B | 0.003386 | | | US TREASURY N/B | 0.003363 | ✓ | | US TREASURY N/B | 0.003227 | ✓ | | US TREASURY N/B | 0.003226 | | | Uniform Mortgage-Backed Security, TBA | 0.003132 | ✓ | | Uniform Mortgage-Backed Security, TBA | 0.003121 | ✓ | | US TREASURY N/B | 0.003044 | | | US TREASURY N/B | 0.003022 | ✓ | | US TREASURY N/B | 0.003014 | ✓ | | Uniform Mortgage-Backed Security, TBA | 0.002988 | | | US TREASURY N/B | 0.002963 | | | US TREASURY N/B | 0.002953 | ✓ | | US TREASURY N/B | 0.002947 | ✓ | | US TREASURY N/B | 0.002923 | | | US TREASURY N/B | 0.002873 | ✓ | | US TREASURY N/B | 0.002872 | ✓ | | US TREASURY N/B | 0.002845 | | | US TREASURY N/B | 0.002843 | | | US TREASURY N/B | 0.002824 | | | US TREASURY N/B | 0.002815 | ✓ | | US TREASURY N/B | 0.002808 | ✓ | | US TREASURY N/B | 0.002762 | ✓ | | US TREASURY N/B | 0.002740 | ✓ | | US TREASURY N/B | 0.002711 | ✓ | | US TREASURY N/B | 0.002482 | ✓ | | US TREASURY N/B | 0.002405 | | | US TREASURY N/B | 0.002375 | ✓ | | US TREASURY N/B | 0.002337 | ✓ | | US TREASURY N/B | 0.002332 | ✓ | | US TREASURY N/B | 0.002318 | ✓ | | US TREASURY N/B | 0.002255 | | | US TREASURY N/B | 0.002251 | | | US TREASURY N/B | 0.002247 | ✓ | | US TREASURY N/B | 0.002245 | | | US TREASURY N/B | 0.002209 | ✓ | | US TREASURY N/B | 0.002208 | ✓ | | US TREASURY N/B | 0.002206 | ✓ | ## Sources - N-PORT (fund A) — accession `0000035402-26-002627` (as of 2026-02-28) - N-PORT (fund B) — accession `0001410368-26-039972` (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 _