# Portfolio overlap — MGSIX vs BFIX Comparing **MFS Government Securities Fund** (2026-02-28) and **Build Bond Innovation ETF** (2026-03-31). - Shared positions: 3 - MFS Government Securities Fund covered by Build Bond Innovation ETF: 0.08970742495448227720521402831 - Build Bond Innovation ETF covered by MFS Government Securities Fund: 0.08970742495448227720521402831 ## MFS Government Securities Fund — top positions | Security | Weight | Shared | |----------|--------|--------| | US TREASURY N/B | 0.043040 | ✓ | | US TREASURY N/B | 0.041534 | | | US TREASURY N/B | 0.037557 | ✓ | | US TREASURY N/B | 0.034432 | | | MFS Institutional Money Market Portfolio, Class A | 0.031650 | | | US TREASURY N/B | 0.025619 | | | US TREASURY N/B | 0.018485 | | | US TREASURY N/B | 0.018202 | | | US TREASURY N/B | 0.017927 | | | US TREASURY N/B | 0.016762 | | | FNCL 2 4/26 | 0.015755 | | | US TREASURY N/B | 0.014594 | | | US TREASURY N/B | 0.013441 | | | FHMS K057 A2 | 0.012160 | | | US TREASURY N/B | 0.010569 | | | US TREASURY N/B | 0.010081 | ✓ | | FN MA4562 | 0.009974 | | | FHMS K066 A2 | 0.009793 | | | US TREASURY N/B | 0.009052 | | | US TREASURY N/B | 0.008949 | | | G2 MA8268 | 0.008128 | | | Uniform Mortgage-Backed Security, TBA | 0.008109 | | | FHMS K062 A2 | 0.007885 | | | Federal Home Loan Mortgage Corporation | 0.006362 | | | FR SD8507 | 0.006002 | | | UMBS | 0.005694 | | | FHMS K059 A2 | 0.005686 | | | US TREASURY N/B | 0.005597 | | | US TREASURY N/B | 0.005504 | | | US TREASURY N/B | 0.005334 | | | GNMA, Series 2023-135, Class FG | 0.005147 | | | FHMS K737 A2 | 0.005139 | | | GNMA, Series 2023-189, Class FG | 0.005046 | | | GNMA, Series 2023-149, Class YF | 0.005008 | | | Government National Mortgage Association | 0.004995 | | | GNMA, Series 2023-146, Class FD | 0.004961 | | | US TREASURY N/B | 0.004843 | | | New Residential Mortgage Loan Trust, Series 2026-NQM3, Class A1 | 0.004828 | | | PMT Loan Trust, Series 2026-INV2, Class A35 | 0.004811 | | | FHMS K065 A2 | 0.004801 | | | LoanCore Issuer Ltd., Series 2021-CRE6, Class AS | 0.004791 | | | UMBS | 0.004783 | | | G2 MA7935 | 0.004630 | | | GNMA, Series 2025-177, Class FA | 0.004628 | | | Government National Mortgage Association | 0.004617 | | | G2 MA7880 | 0.004579 | | | FN MA5353 | 0.004553 | | | Government National Mortgage Association | 0.004543 | | | Government National Mortgage Association | 0.004509 | | | American Credit Acceptance Receivables Trust, Series 2026-1, Class A | 0.004357 | | ## Build Bond Innovation ETF — top positions | Security | Weight | Shared | |----------|--------|--------| | US TREASURY N/B | 0.072801 | | | US TREASURY N/B | 0.052972 | | | US TREASURY N/B | 0.052365 | ✓ | | US TREASURY N/B | 0.051884 | | | US TREASURY N/B | 0.051808 | | | US TREASURY N/B | 0.042070 | ✓ | | US TREASURY N/B | 0.041616 | | | US TREASURY N/B | 0.039828 | | | US TREASURY N/B | 0.038794 | ✓ | | US TREASURY N/B | 0.035909 | | | US TREASURY N/B | 0.028005 | | | US TREASURY N/B | 0.025554 | | | US TREASURY N/B | 0.021607 | | | US TREASURY N/B | 0.017544 | | | US TREASURY N/B | 0.013444 | | | ESSEX PORTFOLIO | 0.012438 | | | US TREASURY N/B | 0.012007 | | | AUTOZONE INC | 0.010522 | | | US TREASURY N/B | 0.010408 | | | HUNT INGALLS IND | 0.010181 | | | ORACLE CORP | 0.009837 | | | AVALONBAY COMMUN | 0.009638 | | | INTERCONTINENT | 0.009611 | | | IBM CORP | 0.009563 | | | ESSEX PORTFOLIO | 0.009409 | | | LOWE'S COS INC | 0.009065 | | | GEORGIA POWER | 0.008614 | | | ANALOG DEVICES | 0.008068 | | | Clorox Co/The | 0.007807 | | | AT&T INC | 0.007565 | | | AUTODESK INC | 0.007097 | | | RADIAN GROUP INC | 0.007093 | | | TELEDYNE TECH | 0.007019 | | | TOYOTA MTR CRED | 0.006864 | | | ENERGY TRANSFER | 0.006736 | | | AMPHENOL CORP | 0.006590 | | | PHILLIPS 66 CO | 0.006364 | | | BERKSHIRE HATHAW | 0.006341 | | | MARRIOTT INTL | 0.006126 | | | TOYOTA MTR CRED | 0.006081 | | | KMI 7 1/2 11/15/26 | 0.005755 | | | FRST AM-GV OB-X | 0.005717 | | | WASTE MANAGEMENT | 0.005621 | | | HERSHEY COMPANY | 0.005462 | | | NUCOR CORP | 0.005351 | | | WALMART INC | 0.005342 | | | US BANCORP | 0.005260 | | | ENTERPRISE PRODUCTS OPER REGD 4.15000000 | 0.005095 | | | SCHLUMBERGER INV | 0.004965 | | | T-MOBILE USA INC | 0.004942 | | ## Sources - N-PORT (fund A) — accession `0002071691-26-008227` (as of 2026-02-28) - N-PORT (fund B) — accession `0000894189-26-016538` (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 _