# Portfolio overlap — RMBEX vs FIGDX Comparing **American Funds Mortgage Fund** (2026-02-28) and **Fidelity Series Sustainable Investment Grade Bond Fund** (2026-02-28). - Shared positions: 20 - American Funds Mortgage Fund covered by Fidelity Series Sustainable Investment Grade Bond Fund: 0.07228654987891845059678487518 - Fidelity Series Sustainable Investment Grade Bond Fund covered by American Funds Mortgage Fund: 0.07228654987891845059678487518 ## American Funds Mortgage Fund — top positions | Security | Weight | Shared | |----------|--------|--------| | CAPITAL GROUP CENTRAL CASH FUND | 0.036451 | | | FHLBanks Office of Finance | 0.032045 | | | FNCL 6 3/24 | 0.027502 | ✓ | | FR RQ0028 | 0.026589 | | | Federal Home Loan Bank Discount Notes | 0.024785 | | | FHLBDN 0 05/04/22 | 0.024773 | | | FHLBanks Office of Finance | 0.021288 | | | Federal Home Loan Bank Discount Notes | 0.017707 | | | Federal Home Loan Bank Discount Notes | 0.017663 | | | Federal Home Loan Bank (FHLB) | 0.012198 | | | FED HM LN BK BD 6/18/2026 | 0.011274 | | | FED HOME LN DISCOUNT NT DISCOUNT NOT 03/26 0.00000 | 0.010672 | | | FN MA5701 | 0.010578 | | | FR SD8290 | 0.010168 | | | US TREASURY N/B | 0.010010 | | | FHLB | 0.008864 | | | FHLBanks Office of Finance | 0.008862 | | | US TREASURY N/B | 0.008775 | ✓ | | FNCL 2 4/26 | 0.008719 | ✓ | | US TREASURY N/B | 0.008550 | ✓ | | FR SD8534 | 0.008438 | | | FR SD8342 | 0.008391 | | | FN 190445 | 0.008056 | | | US TREASURY N/B | 0.007844 | | | Uniform Mortgage-Backed Security, TBA | 0.007568 | ✓ | | FR SD8496 | 0.007417 | | | FNMA 30YR 2.5% 07/01/2052#FA2839 | 0.007037 | | | FNMDI4 3.5 BF0765 09-01-63 | 0.007031 | | | FR RQ0015 | 0.006732 | | | FR RB5113 | 0.006728 | | | FR SL2621 | 0.006596 | | | FR SD8507 | 0.006374 | | | FNMA 30YR 2.5% 07/01/2052#FS7879 | 0.006359 | | | FNMA 30YR 6% 02/01/2055#MA5615 | 0.005784 | | | US TREASURY N/B | 0.005619 | ✓ | | FR SD8213 | 0.005502 | | | FN MA5674 | 0.005321 | | | FHLB | 0.005307 | | | FED HM LN BK BD 5/15/2026 | 0.005303 | | | FN MA5735 | 0.005237 | | | FNCL UMBS 6.5 FA2842 07-01-55 | 0.005193 | | | G2 MA7051 | 0.005134 | | | Federal Farm Credit, 03 | 0.004985 | | | FNCL UMBS 6.0 QX4065 01-01-55 | 0.004960 | | | UMBS, 30 Year | 0.004817 | | | FED HOME LN DISCOUNT NT DISCOUNT NOT 03/26 0.00000 | 0.004768 | | | US TREASURY N/B | 0.004571 | ✓ | | Federal Home Loan Bank Discount Notes | 0.004523 | | | GOVERNMENT NATIONAL MORTGAGE CORPORATION | 0.004435 | | | Fannie Mae or Freddie Mac | 0.004320 | | ## Fidelity Series Sustainable Investment Grade Bond Fund — top positions | Security | Weight | Shared | |----------|--------|--------| | Fidelity Cash Central Fund | 0.118574 | | | US TREASURY N/B | 0.028052 | | | US TREASURY N/B | 0.025998 | | | US TREASURY N/B | 0.023824 | | | US TREASURY N/B | 0.019985 | | | US TREASURY N/B | 0.019215 | | | US TREASURY N/B | 0.018442 | | | US TREASURY N/B | 0.017706 | | | US TREASURY N/B | 0.017695 | | | US TREASURY N/B | 0.017661 | ✓ | | US TREASURY N/B | 0.017113 | | | Uniform Mortgage-Backed Security, TBA | 0.016379 | ✓ | | US TREASURY N/B | 0.016333 | | | US TREASURY N/B | 0.016062 | ✓ | | Allegro CLO XII Ltd., Series 2020-1A, Class A1R | 0.015248 | | | RR Ltd., Series 2024-28RA, Class A1R | 0.015242 | | | Magnetite XXVI Ltd., Series 2020-26A, Class AR2 | 0.015230 | | | US TREASURY N/B | 0.014231 | | | US TREASURY N/B | 0.014068 | | | US TREASURY N/B | 0.013349 | | | US TREASURY N/B | 0.013100 | | | US TREASURY N/B | 0.012696 | | | US TREASURY N/B | 0.012550 | | | FNCL 6 3/24 | 0.012484 | ✓ | | FNCL 5.5 3/25 | 0.012367 | ✓ | | US TREASURY N/B | 0.012288 | | | US TREASURY N/B | 0.011943 | | | US TREASURY N/B | 0.010879 | | | US TREASURY N/B | 0.010833 | ✓ | | US TREASURY N/B | 0.010148 | | | FNCL 2 4/26 | 0.010080 | ✓ | | US TREASURY N/B | 0.009881 | | | US TREASURY N/B | 0.009659 | ✓ | | US TREASURY N/B | 0.008693 | | | US TREASURY N/B | 0.008564 | | | G2SF 5 3/25 | 0.007634 | | | US TREASURY N/B | 0.006837 | | | US TREASURY N/B | 0.006760 | ✓ | | Uniform Mortgage-Backed Security, TBA | 0.006587 | ✓ | | US TREASURY N/B | 0.006521 | | | Uniform Mortgage-Backed Security, TBA | 0.006244 | | | FNCL 6 4/26 | 0.006241 | | | Government National Mortgage Association, TBA | 0.006209 | | | Magnetite Xlv Ltd., Series 2025-45A, Class A1 | 0.006087 | | | US TREASURY N/B | 0.005870 | | | US TREASURY N/B | 0.005763 | | | Uniform Mortgage-Backed Security, TBA | 0.005735 | ✓ | | FN MA4654 | 0.005723 | | | US TREASURY N/B | 0.005402 | ✓ | | FR SD8106 | 0.005011 | ✓ | ## Sources - N-PORT (fund A) — accession `0001193125-26-182050` (as of 2026-02-28) - N-PORT (fund B) — accession `0000035402-26-002622` (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 _