{
  "page": "compare",
  "query": {
    "a": "MLFHX",
    "b": "MGSIX"
  },
  "retrieved_at": "2026-07-07T16:39:29+00:00",
  "disclaimer": "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.",
  "attribution": "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.",
  "terms": {
    "notice": "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.",
    "url": "https://fundwatcher.app/terms/"
  },
  "fund_a": {
    "name": "MFS Lifetime 2040 Fund",
    "ticker": "MLFHX",
    "slug": "MLFHX",
    "series_id": "S000002505",
    "html_url": "https://fundwatcher.app/funds/MLFHX/"
  },
  "fund_b": {
    "name": "MFS Government Securities Fund",
    "ticker": "MGSIX",
    "slug": "MGSIX",
    "series_id": "S000000693",
    "html_url": "https://fundwatcher.app/funds/MGSIX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.01511344593055248352773219453",
    "coverage_b_by_a": "0.01511344593055248352773219453",
    "shared_count": 1,
    "as_of": {
      "a": "2026-01-31",
      "b": "2026-02-28"
    },
    "a_top": [
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      },
      {
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      },
      {
        "name": "MFS Inflation Adjusted Bond Fund",
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      },
      {
        "name": "MFS Blended Research Value Equity Fund",
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      },
      {
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      {
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      },
      {
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      {
        "name": "MFS Blended Research Growth Equity Fund",
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      },
      {
        "name": "MFS Growth Fund",
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      },
      {
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      },
      {
        "name": "MFS Mid Cap Growth Fund",
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      },
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      {
        "name": "MFS High Income Fund",
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      {
        "name": "MFS Emerging Markets Debt Fund",
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      },
      {
        "name": "MFS Research Bond Fund",
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      },
      {
        "name": "MFS International Intrinsic Value Fund",
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      {
        "name": "MFS-INTL GRW-R6",
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      {
        "name": "MFS Emerging Markets Debt Local Currency Fund",
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      },
      {
        "name": "MFS-INT N D-R6",
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      {
        "name": "MFS Blended Research Small Cap Equity Fund",
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      },
      {
        "name": "MFS Institutional Money Market Portfolio, Class A",
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      },
      {
        "name": "MFS New Discovery Value Fund",
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      {
        "name": "MFS New Discovery Fund",
        "value": "8098337.96",
        "weight": "0.00956982",
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      },
      {
        "name": "MFS Government Securities Fund",
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        "weight": "0.00565199",
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      },
      {
        "name": "MFS Blended Research Emerging Markets Equity Fund",
        "value": "4162460.03",
        "weight": "0.00491879",
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      },
      {
        "name": "MFS Emerging Markets Equity Fund",
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    ],
    "b_top": [
      {
        "name": "US TREASURY N/B",
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      },
      {
        "name": "US TREASURY N/B",
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      {
        "name": "US TREASURY N/B",
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      {
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      {
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      {
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      {
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      {
        "name": "US TREASURY N/B",
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      {
        "name": "US TREASURY N/B",
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      {
        "name": "US TREASURY N/B",
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      {
        "name": "FNCL 2 4/26",
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      {
        "name": "US TREASURY N/B",
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        "weight": "0.01459429",
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      {
        "name": "US TREASURY N/B",
        "value": "28074375.00",
        "weight": "0.01344104",
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      {
        "name": "FHMS K057 A2",
        "value": "25399154.30",
        "weight": "0.01216024",
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      {
        "name": "US TREASURY N/B",
        "value": "22075250.63",
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      {
        "name": "US TREASURY N/B",
        "value": "21055831.88",
        "weight": "0.01008081",
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      },
      {
        "name": "FN MA4562",
        "value": "20833726.03",
        "weight": "0.00997447",
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      },
      {
        "name": "FHMS K066 A2",
        "value": "20454857.15",
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      {
        "name": "US TREASURY N/B",
        "value": "18907927.65",
        "weight": "0.00905246",
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      {
        "name": "US TREASURY N/B",
        "value": "18691048.92",
        "weight": "0.00894863",
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      },
      {
        "name": "G2 MA8268",
        "value": "16977102.67",
        "weight": "0.00812805",
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      },
      {
        "name": "Uniform Mortgage-Backed Security, TBA",
        "value": "16937381.62",
        "weight": "0.00810903",
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      },
      {
        "name": "FHMS K062 A2",
        "value": "16470120.08",
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      {
        "name": "Federal Home Loan Mortgage Corporation",
        "value": "13288654.99",
        "weight": "0.00636215",
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      {
        "name": "FR SD8507",
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      {
        "name": "UMBS",
        "value": "11894046.07",
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      {
        "name": "FHMS K059 A2",
        "value": "11875704.58",
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      {
        "name": "US TREASURY N/B",
        "value": "11690405.58",
        "weight": "0.00559696",
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      {
        "name": "US TREASURY N/B",
        "value": "11495187.56",
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      {
        "name": "US TREASURY N/B",
        "value": "11140201.93",
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      },
      {
        "name": "GNMA, Series 2023-135, Class FG",
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      },
      {
        "name": "FHMS K737 A2",
        "value": "10734453.62",
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      {
        "name": "GNMA, Series 2023-189, Class FG",
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      },
      {
        "name": "GNMA, Series 2023-149, Class YF",
        "value": "10461239.15",
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      },
      {
        "name": "Government National Mortgage Association",
        "value": "10434106.16",
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      },
      {
        "name": "GNMA, Series 2023-146, Class FD",
        "value": "10361255.46",
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      },
      {
        "name": "US TREASURY N/B",
        "value": "10114960.91",
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      },
      {
        "name": "New Residential Mortgage Loan Trust, Series 2026-NQM3, Class A1",
        "value": "10084506.84",
        "weight": "0.00482811",
        "shared": false
      },
      {
        "name": "PMT Loan Trust, Series 2026-INV2, Class A35",
        "value": "10048507.04",
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      },
      {
        "name": "FHMS K065 A2",
        "value": "10027344.72",
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      {
        "name": "LoanCore Issuer Ltd., Series 2021-CRE6, Class AS",
        "value": "10005940.00",
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      },
      {
        "name": "UMBS",
        "value": "9991148.23",
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      {
        "name": "G2 MA7935",
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      {
        "name": "GNMA, Series 2025-177, Class FA",
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      },
      {
        "name": "Government National Mortgage Association",
        "value": "9642944.89",
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      {
        "name": "G2 MA7880",
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      },
      {
        "name": "FN MA5353",
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      },
      {
        "name": "Government National Mortgage Association",
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      },
      {
        "name": "Government National Mortgage Association",
        "value": "9418293.22",
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      },
      {
        "name": "American Credit Acceptance Receivables Trust, Series 2026-1, Class A",
        "value": "9100074.62",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001410368-26-032760",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1330967/000141036826032760/0001410368-26-032760-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0002071691-26-008227",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/356349/000207169126008227/0002071691-26-008227-index.htm"
    }
  ]
}