{
  "page": "compare",
  "query": {
    "a": "MGSIX",
    "b": "VTG"
  },
  "retrieved_at": "2026-07-07T19:13:05+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 Government Securities Fund",
    "ticker": "MGSIX",
    "slug": "MGSIX",
    "series_id": "S000000693",
    "html_url": "https://fundwatcher.app/funds/MGSIX/"
  },
  "fund_b": {
    "name": "VANGUARD TOTAL TREASURY ETF",
    "ticker": "VTG",
    "slug": "VTG",
    "series_id": "S000093522",
    "html_url": "https://fundwatcher.app/funds/VTG/"
  },
  "overlap": {
    "coverage_a_by_b": "0.08883679605029368855200194890",
    "coverage_b_by_a": "0.08883679605029368855200194889",
    "shared_count": 24,
    "as_of": {
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      "b": "2026-03-31"
    },
    "a_top": [
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      },
      {
        "name": "US TREASURY N/B",
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      {
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      },
      {
        "name": "MFS Institutional Money Market Portfolio, Class A",
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      {
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      {
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      {
        "name": "Uniform Mortgage-Backed Security, TBA",
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      {
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      {
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        "value": "10084506.84",
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      {
        "name": "PMT Loan Trust, Series 2026-INV2, Class A35",
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      },
      {
        "name": "FHMS K065 A2",
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      {
        "name": "LoanCore Issuer Ltd., Series 2021-CRE6, Class AS",
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      {
        "name": "American Credit Acceptance Receivables Trust, Series 2026-1, Class A",
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      {
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      {
        "name": "US TREASURY N/B",
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      {
        "name": "US TREASURY N/B",
        "value": "405080.00",
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      {
        "name": "US TREASURY N/B",
        "value": "399803.44",
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      {
        "name": "US TREASURY N/B",
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      {
        "name": "US TREASURY N/B",
        "value": "394528.36",
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      {
        "name": "US TREASURY N/B",
        "value": "391016.09",
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      {
        "name": "US TREASURY N/B",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "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"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0000836906-26-000266",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/836906/000083690626000266/0000836906-26-000266-index.htm"
    }
  ]
}