{
  "page": "compare",
  "query": {
    "a": "MEDAX",
    "b": "EMB"
  },
  "retrieved_at": "2026-07-07T18:05:19+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 Emerging Markets Debt Fund",
    "ticker": "MEDAX",
    "slug": "MEDAX",
    "series_id": "S000002511",
    "html_url": "https://fundwatcher.app/funds/MEDAX/"
  },
  "fund_b": {
    "name": "iShares J.P. Morgan USD Emerging Markets Bond ETF",
    "ticker": "EMB",
    "slug": "EMB",
    "series_id": "S000019798",
    "html_url": "https://fundwatcher.app/funds/EMB/"
  },
  "overlap": {
    "coverage_a_by_b": "0.1681625609991829165871744725",
    "coverage_b_by_a": "0.1681625609991829165871744723",
    "shared_count": 115,
    "as_of": {
      "a": "2026-01-31",
      "b": "2026-01-31"
    },
    "a_top": [
      {
        "name": "MFS Institutional Money Market Portfolio, Class A",
        "value": "299703694.44",
        "weight": "0.03934412",
        "shared": false
      },
      {
        "name": "ARGENTINA",
        "value": "80213235.00",
        "weight": "0.01053013",
        "shared": true
      },
      {
        "name": "ARGENTINA",
        "value": "79816691.50",
        "weight": "0.01047807",
        "shared": true
      },
      {
        "name": "ARGENTINA",
        "value": "77046965.00",
        "weight": "0.01011447",
        "shared": true
      },
      {
        "name": "REPUBLIC OF GHANA SR UNSECURED 144A 07/35 VAR",
        "value": "70855330.49",
        "weight": "0.00930166",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "59210333.92",
        "weight": "0.00777294",
        "shared": false
      },
      {
        "name": "DOMINICAN REPUBLIC INTERNATIONAL BOND REG S 4.875% 09-23-32",
        "value": "55539750.86",
        "weight": "0.00729108",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "55264814.38",
        "weight": "0.00725498",
        "shared": false
      },
      {
        "name": "Republic of Paraguay",
        "value": "55143821.48",
        "weight": "0.00723910",
        "shared": true
      },
      {
        "name": "REPUBLIC OF ECUADOR 6.900000% 07/31/2035",
        "value": "54154675.59",
        "weight": "0.00710925",
        "shared": true
      },
      {
        "name": "UKRAINE GOVT",
        "value": "50366634.66",
        "weight": "0.00661197",
        "shared": true
      },
      {
        "name": "Costa Rica Government International Bond",
        "value": "47523285.81",
        "weight": "0.00623870",
        "shared": false
      },
      {
        "name": "TURKIYE REP OF",
        "value": "41032025.34",
        "weight": "0.00538655",
        "shared": true
      },
      {
        "name": "SOUTH AFRICA REPUBLIC OF 7.3% 04/20/2052",
        "value": "40832343.27",
        "weight": "0.00536034",
        "shared": true
      },
      {
        "name": "REPUBLIC OF ECUADOR 5.000000% 07/31/2040",
        "value": "40189875.00",
        "weight": "0.00527600",
        "shared": true
      },
      {
        "name": "The Democratic Socialist Republic of Sri Lanka",
        "value": "39424487.47",
        "weight": "0.00517552",
        "shared": false
      },
      {
        "name": "Petroleos Mexicanos",
        "value": "39191980.15",
        "weight": "0.00514500",
        "shared": true
      },
      {
        "name": "Republic of Angola",
        "value": "38019567.72",
        "weight": "0.00499108",
        "shared": true
      },
      {
        "name": "Urzad Rady Ministrow",
        "value": "37041160.69",
        "weight": "0.00486264",
        "shared": false
      },
      {
        "name": "Eagle Funding LuxCo S.a.r.l.",
        "value": "36265789.82",
        "weight": "0.00476085",
        "shared": false
      },
      {
        "name": "REPUBLIC OF COLOMBIA REGD 7.75000000",
        "value": "36164379.90",
        "weight": "0.00474754",
        "shared": true
      },
      {
        "name": "CHILE",
        "value": "34225906.50",
        "weight": "0.00449307",
        "shared": true
      },
      {
        "name": "PETRONAS CAP LTD",
        "value": "34220406.71",
        "weight": "0.00449234",
        "shared": false
      },
      {
        "name": "TURKIYE REP OF",
        "value": "33131251.48",
        "weight": "0.00434936",
        "shared": true
      },
      {
        "name": "Egypt Government International Bonds",
        "value": "32622679.85",
        "weight": "0.00428260",
        "shared": true
      },
      {
        "name": "State of Kuwait",
        "value": "32192825.52",
        "weight": "0.00422617",
        "shared": false
      },
      {
        "name": "ROMANIA REGD 144A P/P 6.37500000",
        "value": "31735700.06",
        "weight": "0.00416616",
        "shared": false
      },
      {
        "name": "PETRONAS CAP LTD",
        "value": "31376609.78",
        "weight": "0.00411902",
        "shared": false
      },
      {
        "name": "SOUTH AFRICA REPUBLIC OF 7.25% 12/11/2055 144A",
        "value": "30795362.00",
        "weight": "0.00404271",
        "shared": false
      },
      {
        "name": "Romanian Government International Bond",
        "value": "30743860.44",
        "weight": "0.00403595",
        "shared": false
      },
      {
        "name": "REP OF NIGERIA",
        "value": "30597990.32",
        "weight": "0.00401680",
        "shared": true
      },
      {
        "name": "REPUBLIC OF COLOMBIA SR UNSECURED 11/35 8",
        "value": "30234105.00",
        "weight": "0.00396903",
        "shared": true
      },
      {
        "name": "Ma'aden Sukuk Ltd 5.25 01/29/2036",
        "value": "30124100.10",
        "weight": "0.00395459",
        "shared": false
      },
      {
        "name": "SOUTH AFRICA REPUBLIC OF 6.125% 12/11/2037 144A",
        "value": "29809847.36",
        "weight": "0.00391334",
        "shared": false
      },
      {
        "name": "Republic of Colombia",
        "value": "29788774.20",
        "weight": "0.00391057",
        "shared": true
      },
      {
        "name": "UNITED MEXICAN",
        "value": "29753508.00",
        "weight": "0.00390594",
        "shared": true
      },
      {
        "name": "BANCO INTERNACIONAL DEL PERU SAA INTERBANK 144A LIFE SR UNSEC 4.8% 07-15-31",
        "value": "29639051.20",
        "weight": "0.00389092",
        "shared": false
      },
      {
        "name": "Republic of Cote d'Ivoire",
        "value": "29381780.95",
        "weight": "0.00385714",
        "shared": true
      },
      {
        "name": "Republic of Cote d'Ivoire",
        "value": "29199439.55",
        "weight": "0.00383321",
        "shared": false
      },
      {
        "name": "State of Kuwait",
        "value": "29193840.00",
        "weight": "0.00383247",
        "shared": false
      },
      {
        "name": "Guatemala Government Bond",
        "value": "29005011.99",
        "weight": "0.00380768",
        "shared": false
      },
      {
        "name": "BANGKOK BANK PCL REG S SUB 3.733% 09-25-34/29",
        "value": "28920447.01",
        "weight": "0.00379658",
        "shared": false
      },
      {
        "name": "Venezuela Government International Bonds",
        "value": "28855481.55",
        "weight": "0.00378805",
        "shared": false
      },
      {
        "name": "Navoiy Kon-Metallurgiya Kombinati Aksiyadorlik Jamiyati",
        "value": "28796883.26",
        "weight": "0.00378036",
        "shared": false
      },
      {
        "name": "Sultanate of Oman Government Bond",
        "value": "28712849.50",
        "weight": "0.00376933",
        "shared": true
      },
      {
        "name": "UNITED MEXICAN",
        "value": "28010781.50",
        "weight": "0.00367716",
        "shared": true
      },
      {
        "name": "Ecuador Government International Bonds",
        "value": "27973555.00",
        "weight": "0.00367228",
        "shared": true
      },
      {
        "name": "Sandor-Palota",
        "value": "27664371.30",
        "weight": "0.00363169",
        "shared": false
      },
      {
        "name": "Sultanate of Oman Government Bond",
        "value": "27558302.21",
        "weight": "0.00361776",
        "shared": true
      },
      {
        "name": "Ecuador Government International Bonds",
        "value": "27298280.00",
        "weight": "0.00358363",
        "shared": true
      }
    ],
    "b_top": [
      {
        "name": "ARGENTINA",
        "value": "187158278.82",
        "weight": "0.01123611",
        "shared": true
      },
      {
        "name": "REPUBLIC OF ECUADOR 6.900000% 07/31/2035",
        "value": "131751312.08",
        "weight": "0.00790974",
        "shared": true
      },
      {
        "name": "BlackRock Cash Funds: Treasury, SL Agency Shares",
        "value": "120620000.00",
        "weight": "0.00724146",
        "shared": false
      },
      {
        "name": "REPUBLIC OF ARGENTINA SR UNSECURED 07/30 VAR",
        "value": "115937366.42",
        "weight": "0.00696034",
        "shared": false
      },
      {
        "name": "ARGENTINA",
        "value": "108787352.24",
        "weight": "0.00653109",
        "shared": true
      },
      {
        "name": "ARGENTINA",
        "value": "89942217.48",
        "weight": "0.00539971",
        "shared": true
      },
      {
        "name": "Mexico Government International Bonds",
        "value": "86264850.00",
        "weight": "0.00517894",
        "shared": true
      },
      {
        "name": "REPUBLIC OF GHANA 5.000000% 07/03/2035",
        "value": "84151719.47",
        "weight": "0.00505208",
        "shared": true
      },
      {
        "name": "URUGUAY",
        "value": "82963285.99",
        "weight": "0.00498073",
        "shared": false
      },
      {
        "name": "REP OF POLAND",
        "value": "67153706.00",
        "weight": "0.00403160",
        "shared": false
      },
      {
        "name": "Sultanate of Oman Government Bond",
        "value": "66687840.00",
        "weight": "0.00400363",
        "shared": true
      },
      {
        "name": "Presidencia da Republica",
        "value": "64959010.00",
        "weight": "0.00389984",
        "shared": false
      },
      {
        "name": "REP OF POLAND",
        "value": "61194975.48",
        "weight": "0.00367386",
        "shared": true
      },
      {
        "name": "DOMINICAN REPUBLIC INTERNATIONAL BOND REG S 4.875% 09-23-32",
        "value": "61111778.00",
        "weight": "0.00366887",
        "shared": true
      },
      {
        "name": "Dominican Republic International Bonds",
        "value": "59751546.75",
        "weight": "0.00358720",
        "shared": false
      },
      {
        "name": "REP OF POLAND",
        "value": "57618184.35",
        "weight": "0.00345913",
        "shared": false
      },
      {
        "name": "REP OF POLAND",
        "value": "57185198.77",
        "weight": "0.00343313",
        "shared": true
      },
      {
        "name": "REPUBLIC OF ECUADOR 5.000000% 07/31/2040",
        "value": "55879286.57",
        "weight": "0.00335473",
        "shared": true
      },
      {
        "name": "Hungary Government International Bonds",
        "value": "55209742.00",
        "weight": "0.00331454",
        "shared": true
      },
      {
        "name": "REPUBLIC OF PERU",
        "value": "54559384.00",
        "weight": "0.00327549",
        "shared": false
      },
      {
        "name": "SOUTH AFRICA REPUBLIC OF 5.75% 09/30/2049",
        "value": "54387097.66",
        "weight": "0.00326515",
        "shared": true
      },
      {
        "name": "PETRONAS CAP LTD",
        "value": "54377882.13",
        "weight": "0.00326459",
        "shared": false
      },
      {
        "name": "Egypt Government International Bonds",
        "value": "54109664.70",
        "weight": "0.00324849",
        "shared": true
      },
      {
        "name": "REPUBLIC OF GHANA 5.000000% 07/03/2029",
        "value": "52800625.92",
        "weight": "0.00316990",
        "shared": false
      },
      {
        "name": "URUGUAY",
        "value": "52641730.33",
        "weight": "0.00316036",
        "shared": true
      },
      {
        "name": "Oman Government International Bonds",
        "value": "52388752.50",
        "weight": "0.00314518",
        "shared": false
      },
      {
        "name": "REPUBLIC OF PERU",
        "value": "52342050.00",
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      },
      {
        "name": "URUGUAY",
        "value": "51888084.38",
        "weight": "0.00311512",
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      },
      {
        "name": "Sultanate of Oman Government Bond",
        "value": "51838650.00",
        "weight": "0.00311215",
        "shared": false
      },
      {
        "name": "REP OF POLAND",
        "value": "51502968.96",
        "weight": "0.00309200",
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      },
      {
        "name": "Petroleos Mexicanos",
        "value": "50654700.00",
        "weight": "0.00304107",
        "shared": true
      },
      {
        "name": "Hungary Government International Bonds",
        "value": "50021550.00",
        "weight": "0.00300306",
        "shared": false
      },
      {
        "name": "Jamaica, The Government of",
        "value": "49224435.00",
        "weight": "0.00295521",
        "shared": false
      },
      {
        "name": "REPUBLIC OF PERU",
        "value": "49174009.50",
        "weight": "0.00295218",
        "shared": false
      },
      {
        "name": "PETRONAS CAPITAL LTD REG S SR UNSEC 3.5% 04-21-30",
        "value": "49099862.70",
        "weight": "0.00294773",
        "shared": false
      },
      {
        "name": "PANAMA",
        "value": "48601768.29",
        "weight": "0.00291782",
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      },
      {
        "name": "REP OF POLAND",
        "value": "48345411.28",
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        "shared": false
      },
      {
        "name": "PETROLEOS MEXICANOS SR UNSEC SF 6.7% 02-16-32",
        "value": "47468925.45",
        "weight": "0.00284981",
        "shared": false
      },
      {
        "name": "Sultanate of Oman Government Bond",
        "value": "47345639.88",
        "weight": "0.00284241",
        "shared": true
      },
      {
        "name": "South Africa Government Bond",
        "value": "47055302.23",
        "weight": "0.00282498",
        "shared": true
      },
      {
        "name": "URUGUAY",
        "value": "46745133.01",
        "weight": "0.00280636",
        "shared": true
      },
      {
        "name": "Presidencia da Republica",
        "value": "46537953.00",
        "weight": "0.00279392",
        "shared": false
      },
      {
        "name": "ROMANIAN GOVERNMENT INTERNATIONAL BOND",
        "value": "46331688.60",
        "weight": "0.00278154",
        "shared": false
      },
      {
        "name": "Romanian Government International Bond",
        "value": "46324834.08",
        "weight": "0.00278113",
        "shared": false
      },
      {
        "name": "ROMANIAN GOVERNMENT INTERNATIONAL BOND REG S 6.375% 01-30-34",
        "value": "45709140.78",
        "weight": "0.00274416",
        "shared": true
      },
      {
        "name": "Dominican Republic International Bonds",
        "value": "44718510.00",
        "weight": "0.00268469",
        "shared": true
      },
      {
        "name": "The Democratic Socialist Republic of Sri Lanka",
        "value": "44363526.62",
        "weight": "0.00266338",
        "shared": false
      },
      {
        "name": "State Grid Overseas Investment BVI Ltd.",
        "value": "44330051.57",
        "weight": "0.00266137",
        "shared": false
      },
      {
        "name": "ROMANIA REPUBLIC OF 5.75% 03/24/2035 REGS",
        "value": "44315125.00",
        "weight": "0.00266047",
        "shared": true
      },
      {
        "name": "UKRAINE GOVT",
        "value": "44301169.79",
        "weight": "0.00265964",
        "shared": true
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001410368-26-032757",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/783740/000141036826032757/0001410368-26-032757-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001410368-26-031694",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1100663/000141036826031694/0001410368-26-031694-index.htm"
    }
  ]
}