{
  "page": "compare",
  "query": {
    "a": "LFIBX",
    "b": "MGSIX"
  },
  "retrieved_at": "2026-07-07T15:58:21+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 2055 Fund",
    "ticker": "LFIBX",
    "slug": "LFIBX",
    "series_id": "S000038776",
    "html_url": "https://fundwatcher.app/funds/LFIBX/"
  },
  "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": "0.01474991613576272894857819316",
    "coverage_b_by_a": "0.01474991613576272894857819316",
    "shared_count": 1,
    "as_of": {
      "a": "2026-01-31",
      "b": "2026-02-28"
    },
    "a_top": [
      {
        "name": "MFS Blended Research International Equity Fund",
        "value": "51956072.12",
        "weight": "0.11449141",
        "shared": false
      },
      {
        "name": "MFS Blended Research Mid Cap Equity Fund",
        "value": "44850178.83",
        "weight": "0.09883272",
        "shared": false
      },
      {
        "name": "MFS Blended Research Value Equity Fund",
        "value": "25193250.97",
        "weight": "0.05551633",
        "shared": false
      },
      {
        "name": "MFS-VALUE-R6",
        "value": "24915622.33",
        "weight": "0.05490455",
        "shared": false
      },
      {
        "name": "MFS Commodity Strategy Fund",
        "value": "23689585.98",
        "weight": "0.05220283",
        "shared": false
      },
      {
        "name": "MFS Blended Research Growth Equity Fund",
        "value": "22859433.83",
        "weight": "0.05037349",
        "shared": false
      },
      {
        "name": "MFS Mid Cap Value Fund",
        "value": "22671749.80",
        "weight": "0.04995991",
        "shared": false
      },
      {
        "name": "MFS Growth Fund",
        "value": "22671660.24",
        "weight": "0.04995971",
        "shared": false
      },
      {
        "name": "MFS-GL RL ES-R5",
        "value": "22630926.79",
        "weight": "0.04986995",
        "shared": false
      },
      {
        "name": "MFS Mid Cap Growth Fund",
        "value": "21782866.07",
        "weight": "0.04800114",
        "shared": false
      },
      {
        "name": "MFS Blended Research Core Equity Fund",
        "value": "20910939.22",
        "weight": "0.04607975",
        "shared": false
      },
      {
        "name": "MFS-RESEAR-R6",
        "value": "20825083.20",
        "weight": "0.04589056",
        "shared": false
      },
      {
        "name": "MFS-RSCH IN-R6",
        "value": "18792548.14",
        "weight": "0.04141162",
        "shared": false
      },
      {
        "name": "MFS-INT N D-R6",
        "value": "18549071.06",
        "weight": "0.04087509",
        "shared": false
      },
      {
        "name": "MFS International Intrinsic Value Fund",
        "value": "16273830.71",
        "weight": "0.03586133",
        "shared": false
      },
      {
        "name": "MFS-INTL GRW-R6",
        "value": "16113235.00",
        "weight": "0.03550744",
        "shared": false
      },
      {
        "name": "MFS Inflation Adjusted Bond Fund",
        "value": "11266192.92",
        "weight": "0.02482640",
        "shared": false
      },
      {
        "name": "MFS Blended Research Small Cap Equity Fund",
        "value": "11264397.13",
        "weight": "0.02482244",
        "shared": false
      },
      {
        "name": "MFS Research Bond Fund",
        "value": "9093567.86",
        "weight": "0.02003876",
        "shared": false
      },
      {
        "name": "MFS Institutional Money Market Portfolio, Class A",
        "value": "6693495.52",
        "weight": "0.01474992",
        "shared": true
      },
      {
        "name": "MFS New Discovery Value Fund",
        "value": "5700049.73",
        "weight": "0.01256074",
        "shared": false
      },
      {
        "name": "MFS New Discovery Fund",
        "value": "5592839.53",
        "weight": "0.01232449",
        "shared": false
      },
      {
        "name": "MFS Blended Research Emerging Markets Equity Fund",
        "value": "4797214.08",
        "weight": "0.01057123",
        "shared": false
      },
      {
        "name": "MFS Emerging Markets Equity Fund",
        "value": "4705075.55",
        "weight": "0.01036820",
        "shared": false
      }
    ],
    "b_top": [
      {
        "name": "US TREASURY N/B",
        "value": "89897417.88",
        "weight": "0.04303978",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "86751392.79",
        "weight": "0.04153357",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "78445763.59",
        "weight": "0.03755712",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "71917991.51",
        "weight": "0.03443185",
        "shared": false
      },
      {
        "name": "MFS Institutional Money Market Portfolio, Class A",
        "value": "66107888.58",
        "weight": "0.03165018",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "53509654.88",
        "weight": "0.02561858",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "38610233.88",
        "weight": "0.01848525",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "38019006.74",
        "weight": "0.01820219",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "37444275.00",
        "weight": "0.01792703",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "35011737.03",
        "weight": "0.01676241",
        "shared": false
      },
      {
        "name": "FNCL 2 4/26",
        "value": "32907795.53",
        "weight": "0.01575512",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "30483177.89",
        "weight": "0.01459429",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "28074375.00",
        "weight": "0.01344104",
        "shared": false
      },
      {
        "name": "FHMS K057 A2",
        "value": "25399154.30",
        "weight": "0.01216024",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "22075250.63",
        "weight": "0.01056887",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "21055831.88",
        "weight": "0.01008081",
        "shared": false
      },
      {
        "name": "FN MA4562",
        "value": "20833726.03",
        "weight": "0.00997447",
        "shared": false
      },
      {
        "name": "FHMS K066 A2",
        "value": "20454857.15",
        "weight": "0.00979308",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "18907927.65",
        "weight": "0.00905246",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "18691048.92",
        "weight": "0.00894863",
        "shared": false
      },
      {
        "name": "G2 MA8268",
        "value": "16977102.67",
        "weight": "0.00812805",
        "shared": false
      },
      {
        "name": "Uniform Mortgage-Backed Security, TBA",
        "value": "16937381.62",
        "weight": "0.00810903",
        "shared": false
      },
      {
        "name": "FHMS K062 A2",
        "value": "16470120.08",
        "weight": "0.00788533",
        "shared": false
      },
      {
        "name": "Federal Home Loan Mortgage Corporation",
        "value": "13288654.99",
        "weight": "0.00636215",
        "shared": false
      },
      {
        "name": "FR SD8507",
        "value": "12536793.09",
        "weight": "0.00600218",
        "shared": false
      },
      {
        "name": "UMBS",
        "value": "11894046.07",
        "weight": "0.00569446",
        "shared": false
      },
      {
        "name": "FHMS K059 A2",
        "value": "11875704.58",
        "weight": "0.00568568",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "11690405.58",
        "weight": "0.00559696",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "11495187.56",
        "weight": "0.00550350",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "11140201.93",
        "weight": "0.00533354",
        "shared": false
      },
      {
        "name": "GNMA, Series 2023-135, Class FG",
        "value": "10750626.78",
        "weight": "0.00514703",
        "shared": false
      },
      {
        "name": "FHMS K737 A2",
        "value": "10734453.62",
        "weight": "0.00513929",
        "shared": false
      },
      {
        "name": "GNMA, Series 2023-189, Class FG",
        "value": "10539187.92",
        "weight": "0.00504580",
        "shared": false
      },
      {
        "name": "GNMA, Series 2023-149, Class YF",
        "value": "10461239.15",
        "weight": "0.00500848",
        "shared": false
      },
      {
        "name": "Government National Mortgage Association",
        "value": "10434106.16",
        "weight": "0.00499549",
        "shared": false
      },
      {
        "name": "GNMA, Series 2023-146, Class FD",
        "value": "10361255.46",
        "weight": "0.00496061",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "10114960.91",
        "weight": "0.00484269",
        "shared": false
      },
      {
        "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",
        "weight": "0.00481088",
        "shared": false
      },
      {
        "name": "FHMS K065 A2",
        "value": "10027344.72",
        "weight": "0.00480075",
        "shared": false
      },
      {
        "name": "LoanCore Issuer Ltd., Series 2021-CRE6, Class AS",
        "value": "10005940.00",
        "weight": "0.00479050",
        "shared": false
      },
      {
        "name": "UMBS",
        "value": "9991148.23",
        "weight": "0.00478342",
        "shared": false
      },
      {
        "name": "G2 MA7935",
        "value": "9671285.77",
        "weight": "0.00463028",
        "shared": false
      },
      {
        "name": "GNMA, Series 2025-177, Class FA",
        "value": "9666301.78",
        "weight": "0.00462789",
        "shared": false
      },
      {
        "name": "Government National Mortgage Association",
        "value": "9642944.89",
        "weight": "0.00461671",
        "shared": false
      },
      {
        "name": "G2 MA7880",
        "value": "9564613.12",
        "weight": "0.00457921",
        "shared": false
      },
      {
        "name": "FN MA5353",
        "value": "9509870.03",
        "weight": "0.00455300",
        "shared": false
      },
      {
        "name": "Government National Mortgage Association",
        "value": "9489523.06",
        "weight": "0.00454326",
        "shared": false
      },
      {
        "name": "Government National Mortgage Association",
        "value": "9418293.22",
        "weight": "0.00450915",
        "shared": false
      },
      {
        "name": "American Credit Acceptance Receivables Trust, Series 2026-1, Class A",
        "value": "9100074.62",
        "weight": "0.00435680",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001410368-26-032755",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1330967/000141036826032755/0001410368-26-032755-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"
    }
  ]
}