{
  "page": "compare",
  "query": {
    "a": "MIAKX",
    "b": "PRIPX"
  },
  "retrieved_at": "2026-07-07T18:49:34+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 Inflation-Adjusted Bond Fund",
    "ticker": "MIAKX",
    "slug": "MIAKX",
    "series_id": "S000002493",
    "html_url": "https://fundwatcher.app/funds/MIAKX/"
  },
  "fund_b": {
    "name": "T. Rowe Price Inflation Protected Bond Fund, Inc.",
    "ticker": "PRIPX",
    "slug": "PRIPX",
    "series_id": "S000002133",
    "html_url": "https://fundwatcher.app/funds/PRIPX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.4377397845950669770382939021",
    "coverage_b_by_a": "0.4377397845950669770382939021",
    "shared_count": 21,
    "as_of": {
      "a": "2026-01-31",
      "b": "2026-02-28"
    },
    "a_top": [
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      },
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        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/8% 07/15/2027",
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        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/4% 02/15/2042",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1.125% 01/15/2033",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 3-5/8% 04/15/28",
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      {
        "name": "U.S. Treasury Inflation-Linked Notes",
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      },
      {
        "name": "U.S. Treasury Notes",
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      {
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      {
        "name": "U.S. Treasury Inflation-Protected Indexed Notes",
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      {
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      {
        "name": "U.S. Treasury Notes 0.125%, Due 1/15/2030",
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        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-5/8% 07/15/2032",
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      {
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      {
        "name": "Palmer Square Loan Funding Ltd., Series 2025-2A, Class A2",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/4% 07/15/2028",
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      {
        "name": "Fannie Mae REMICS",
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      {
        "name": "SHACKLETON CLO LTD SHACK 2019 14A BRR 144A",
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      {
        "name": "Freddie Mac REMICS",
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      {
        "name": "Government National Mortgage Association",
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        "name": "PFS Financing Corp., Series 2025-A, Class A",
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        "name": "Barings CLO Ltd., Series 2021-3A, Class B1R",
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        "name": "Government National Mortgage Association",
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      {
        "name": "AREIT Trust, Series 2022-CRE6, Class AS",
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      {
        "name": "Government National Mortgage Association",
        "value": "2405828.03",
        "weight": "0.00156548",
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      {
        "name": "GreatAmerica Leasing Receivables Funding LLC, Series 2025-1, Class A2",
        "value": "2317538.67",
        "weight": "0.00150803",
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      {
        "name": "FNMA, Series 2023-54, Class FD",
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      },
      {
        "name": "Government National Mortgage Association",
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      {
        "name": "PMTLT 2025-INV10 A36",
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      },
      {
        "name": "Government National Mortgage Association",
        "value": "1482485.68",
        "weight": "0.00096466",
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      {
        "name": "PMTLT 2026-CNF1 A26",
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      {
        "name": "CONSFD 3.474 12/15/29 2019",
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      {
        "name": "Freddie Mac Multifamily Structured Pass Through Certificates",
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      {
        "name": "ARI Fleet Lease Trust, Series 2025-A, Class A2",
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      {
        "name": "Government National Mortgage Association",
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      {
        "name": "MSRM 2025-NQM3 VAR 05/25/2070 144A",
        "value": "1284913.85",
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      {
        "name": "J.P. Morgan Mortgage Trust, Series 2026-NQM1, Class A1",
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      {
        "name": "Freddie Mac Multifamily Structured Pass Through Certificates",
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    ],
    "b_top": [
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      {
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES .125 07/15/2030",
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      {
        "name": "U.S. Treasury Notes",
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        "name": "U.S. Treasury Inflation-Protected Indexed Notes",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/2% 01/15/2028",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1.250 04/15/2028",
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        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8% 04/15/2027",
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        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-5/8% 07/15/2032",
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      {
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      {
        "name": "U.S. Treasury Notes",
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      {
        "name": "U.S. Treasury Notes 0.125%, Due 1/15/2030",
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      {
        "name": "U.S. Treasury Inflation-Linked Notes",
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      {
        "name": "U.S. Treasury Inflation-Protected Notes 2.125%, Due 02/15/2054",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES .25%  07/15/29",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8% 01/15/2031",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8% 07/15/2031",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1.125% 01/15/2033",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/4% 07/15/2028",
        "value": "8650512.61",
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      {
        "name": "U.S. Treasury Inflation-Indexed Notes",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 3-7/8% 04/15/29",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 2-1/2% 01/15/29",
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        "name": "U.S. Treasury Notes",
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        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1-3/8% 02/15/2044",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/4% 02/15/2042",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1-3/4% 01/15/28",
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      {
        "name": "U.S. Treasury Inflation-Protected Indexed Notes",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-5/8% 02/15/2043",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/8% 07/15/2027",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-7/8% 02/15/2047",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/4% 02/15/2045",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1.50% 2/15/2053",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1% 02/15/46",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0.25% 02/15/2050",
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      {
        "name": "U.S. Treasury Inflation Linked Bonds",
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      {
        "name": "U.S. Treasury Inflation-Protected Indexed Bonds",
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      {
        "name": "U.S. Treasury Inflation-Protected Indexed Bonds",
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        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1% 02/15/48",
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      {
        "name": "T Rowe Price Government Reserve Investment Fund",
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      {
        "name": "U.S. Treasury Inflation-Protected Indexed Bonds",
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      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8%  02/15/2052",
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      {
        "name": "5-Year T-Note Futures, Jun-2026,ETH",
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      {
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001410368-26-032759",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/63075/000141036826032759/0001410368-26-032759-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001099263-26-004451",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1181628/000109926326004451/0001099263-26-004451-index.htm"
    }
  ]
}