# Portfolio overlap — FIFZX vs SPAB Comparing **Fidelity Series Bond Index Fund** (2026-02-28) and **State Street(R) SPDR(R) Portfolio Aggregate Bond ETF** (2026-03-31). - Shared positions: 3057 - Fidelity Series Bond Index Fund covered by State Street(R) SPDR(R) Portfolio Aggregate Bond ETF: 0.3801578617490046792135470156 - State Street(R) SPDR(R) Portfolio Aggregate Bond ETF covered by Fidelity Series Bond Index Fund: 0.3801578617490046792135470158 ## 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 | | ## State Street(R) SPDR(R) Portfolio Aggregate Bond ETF — top positions | Security | Weight | Shared | |----------|--------|--------| | State Street Navigator Securities Lending Portfolio II | 0.057240 | | | US TREASURY N/B | 0.008189 | ✓ | | US TREASURY N/B | 0.004368 | ✓ | | US TREASURY N/B | 0.004241 | ✓ | | US TREASURY N/B | 0.004129 | ✓ | | US TREASURY N/B | 0.004037 | ✓ | | US TREASURY N/B | 0.003732 | ✓ | | FNCL 5 4/26 | 0.003617 | | | US TREASURY N/B | 0.003583 | | | US TREASURY N/B | 0.003561 | ✓ | | US TREASURY N/B | 0.003546 | ✓ | | US TREASURY N/B | 0.003529 | ✓ | | US TREASURY N/B | 0.003522 | ✓ | | US TREASURY N/B | 0.003500 | ✓ | | US TREASURY N/B | 0.003479 | ✓ | | G2SF 5 4/26 | 0.003478 | ✓ | | US TREASURY N/B | 0.003427 | | | US TREASURY N/B | 0.003340 | ✓ | | US TREASURY N/B | 0.003275 | | | US TREASURY N/B | 0.003233 | ✓ | | US TREASURY N/B | 0.003185 | ✓ | | US TREASURY N/B | 0.003185 | ✓ | | US TREASURY N/B | 0.003152 | ✓ | | US TREASURY N/B | 0.003114 | ✓ | | US TREASURY N/B | 0.003024 | ✓ | | US TREASURY N/B | 0.002948 | | | US TREASURY N/B | 0.002929 | | | US TREASURY N/B | 0.002883 | | | US TREASURY N/B | 0.002869 | | | US TREASURY N/B | 0.002856 | ✓ | | US TREASURY N/B | 0.002834 | | | US TREASURY N/B | 0.002821 | | | US TREASURY N/B | 0.002759 | ✓ | | US TREASURY N/B | 0.002756 | ✓ | | US TREASURY N/B | 0.002730 | ✓ | | US TREASURY N/B | 0.002711 | ✓ | | US TREASURY N/B | 0.002705 | ✓ | | US TREASURY N/B | 0.002661 | ✓ | | US TREASURY N/B | 0.002616 | ✓ | | US TREASURY N/B | 0.002612 | ✓ | | US TREASURY N/B | 0.002567 | ✓ | | US TREASURY N/B | 0.002563 | ✓ | | US TREASURY N/B | 0.002561 | | | US TREASURY N/B | 0.002550 | ✓ | | US TREASURY N/B | 0.002534 | | | US TREASURY N/B | 0.002515 | ✓ | | US TREASURY N/B | 0.002509 | ✓ | | US TREASURY N/B | 0.002502 | ✓ | | G2SF 5.5 4/25 | 0.002466 | ✓ | | US TREASURY N/B | 0.002461 | ✓ | ## Sources - N-PORT (fund A) — accession `0000035402-26-002627` (as of 2026-02-28) - N-PORT (fund B) — accession `0001410368-26-055560` (as of 2026-03-31) --- _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 _