# Portfolio overlap — FMSFX vs FSIGX Comparing **Fidelity Advisor Mortgage Securities Fund** (2026-02-28) and **Fidelity Series Investment Grade Bond Fund** (2026-02-28). - Shared positions: 1064 - Fidelity Advisor Mortgage Securities Fund covered by Fidelity Series Investment Grade Bond Fund: 0.1811546987617930453432250026 - Fidelity Series Investment Grade Bond Fund covered by Fidelity Advisor Mortgage Securities Fund: 0.1811546987617930453432250026 ## Fidelity Advisor Mortgage Securities Fund — top positions | Security | Weight | Shared | |----------|--------|--------| | GNII II 5.5% 03/01/2056 #TBA | 0.070098 | ✓ | | Uniform Mortgage-Backed Security, TBA | 0.059369 | ✓ | | G2SF 5.5 4/25 | 0.054581 | ✓ | | Government National Mortgage Association, TBA | 0.040294 | ✓ | | Fidelity Cash Central Fund | 0.036023 | ✓ | | FNCL 2 4/26 | 0.035438 | ✓ | | Fannie Mae or Freddie Mac | 0.035224 | ✓ | | FNCL 6 3/24 | 0.023784 | ✓ | | FNCI 5 4/21 | 0.019781 | ✓ | | G2SF 6 4/25 | 0.017221 | ✓ | | G2 MA7986 | 0.013982 | | | US TREASURY N/B | 0.013362 | ✓ | | FREDDIE MAC POOL FR SD0958 | 0.007796 | | | G2 MB0024 | 0.007502 | | | US TREASURY N/B | 0.007038 | | | GNII II 6.5% 03/01/2056 #TBA | 0.006934 | ✓ | | G2 MA7136 | 0.006547 | | | G2 MA7534 | 0.006510 | | | G2 MA7135 | 0.006382 | | | G2 MA7880 | 0.006147 | | | G2 MA8043 | 0.006083 | | | FR SD8121 | 0.005992 | | | FNMA 15YR 2% 07/35#CA6242 | 0.005918 | | | G2 MA7988 | 0.005428 | | | FR SD7535 | 0.004942 | ✓ | | Uniform Mortgage-Backed Securities | 0.004599 | | | FORDF 2023-1 A1 144A 4.92% 05-15-28 | 0.004262 | ✓ | | ONEMAIN FINANCIAL ISSUANCE TRUST 2025-1 SER 2025-1A CL A REGD 144A P/P 4.82000000 | 0.004250 | | | FNCL 5.5 3/25 | 0.004237 | ✓ | | Uniform Mortgage-Backed Security, TBA | 0.004158 | ✓ | | Freddie Mac Pool | 0.004046 | | | FNMA 30YR 6% 11/01/2054#FA2958 | 0.003717 | | | Freddie Mac Multifamily Structured Pass Through Certificates | 0.003668 | ✓ | | FNMA 30YR 2.5% 09/01/2050#FM4342 | 0.003364 | ✓ | | G2 MA6930 | 0.003351 | | | FNMA 30YR 6.5% 07/01/2054#CB8867 | 0.003084 | ✓ | | FNMA 30YR 3% 12/01/2049#FM2077 | 0.003047 | | | FNMA 30YR 6% 07/01/2055#FA3377 | 0.003047 | | | CGCMT 2016-P4 A4 | 0.003024 | | | Government National Mortgage Association | 0.003010 | ✓ | | FR SD8106 | 0.002996 | | | FHLG 30YR 6.5% 09/01/2054#SD6617 | 0.002993 | | | BX TRUST | 0.002954 | ✓ | | G2 MA7051 | 0.002783 | | | FNMA 30YR 2.5% 04/01/2052#FA2214 | 0.002708 | | | FR SD7530 | 0.002666 | | | FREDDIE MAC POOL FR RA5117 | 0.002561 | | | FHMS K555 SOFR30A+50 11/25/2030 | 0.002503 | ✓ | | FHLG 30YR 6% 02/01/2055#SL0360 | 0.002452 | | | FHLG 30YR 5.5% 03/01/2053#SD7559 | 0.002445 | ✓ | ## Fidelity Series Investment Grade Bond Fund — top positions | Security | Weight | Shared | |----------|--------|--------| | Fidelity Cash Central Fund | 0.031044 | ✓ | | US TREASURY N/B | 0.029856 | | | US TREASURY N/B | 0.017286 | | | US TREASURY N/B | 0.017181 | | | US TREASURY N/B | 0.016668 | | | US TREASURY N/B | 0.016083 | | | US TREASURY N/B | 0.014438 | | | US TREASURY N/B | 0.013878 | | | US TREASURY N/B | 0.013624 | | | US TREASURY N/B | 0.013605 | | | US TREASURY N/B | 0.013202 | | | US TREASURY N/B | 0.012819 | | | Government National Mortgage Association, TBA | 0.012790 | ✓ | | US TREASURY N/B | 0.012222 | | | US TREASURY N/B | 0.012181 | | | US TREASURY N/B | 0.011773 | | | GNII II 5.5% 03/01/2056 #TBA | 0.011464 | ✓ | | US TREASURY N/B | 0.011358 | | | US TREASURY N/B | 0.011220 | | | US TREASURY N/B | 0.011051 | | | US TREASURY N/B | 0.010875 | | | FNCL 6 3/24 | 0.010439 | ✓ | | US TREASURY N/B | 0.009957 | | | US TREASURY N/B | 0.009708 | | | US TREASURY N/B | 0.009254 | | | US TREASURY N/B | 0.009052 | | | US TREASURY N/B | 0.008779 | | | G2SF 5.5 4/25 | 0.008677 | ✓ | | US TREASURY N/B | 0.008198 | | | US TREASURY N/B | 0.007978 | | | US TREASURY N/B | 0.007274 | | | US TREASURY N/B | 0.006707 | | | US TREASURY N/B | 0.006689 | | | US TREASURY N/B | 0.006662 | | | US TREASURY N/B | 0.006523 | | | Fannie Mae or Freddie Mac | 0.006108 | ✓ | | US TREASURY N/B | 0.005938 | | | US TREASURY N/B | 0.005873 | | | US TREASURY N/B | 0.005301 | | | US TREASURY N/B | 0.005153 | | | US TREASURY N/B | 0.005103 | | | US TREASURY N/B | 0.005036 | | | US TREASURY N/B | 0.004985 | | | Uniform Mortgage-Backed Security, TBA | 0.004865 | ✓ | | US TREASURY N/B | 0.004724 | | | US TREASURY N/B | 0.004575 | | | US TREASURY N/B | 0.004557 | ✓ | | G2SF 6 4/25 | 0.004362 | ✓ | | FNCL 5.5 3/25 | 0.004346 | ✓ | | GNMA TBA | 0.004326 | | ## Sources - N-PORT (fund A) — accession `0000035402-26-002564` (as of 2026-02-28) - N-PORT (fund B) — accession `0000035402-26-002637` (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 _