{
  "page": "compare",
  "query": {
    "a": "MARO",
    "b": "AIYY"
  },
  "retrieved_at": "2026-07-07T18:25:40+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": "YieldMax MARA Option Income Strategy ETF",
    "ticker": "MARO",
    "slug": "MARO",
    "series_id": "S000086361",
    "html_url": "https://fundwatcher.app/funds/MARO/"
  },
  "fund_b": {
    "name": "YieldMax AI Option Income Strategy ETF",
    "ticker": "AIYY",
    "slug": "AIYY",
    "series_id": "S000082235",
    "html_url": "https://fundwatcher.app/funds/AIYY/"
  },
  "overlap": {
    "coverage_a_by_b": "0.7798402901976316943588020471",
    "coverage_b_by_a": "0.7798402901976316943588020471",
    "shared_count": 7,
    "as_of": {
      "a": "2026-01-31",
      "b": "2026-01-31"
    },
    "a_top": [
      {
        "name": "U.S. Treasury Bills",
        "value": "25502449.66",
        "weight": "0.47925977",
        "shared": true
      },
      {
        "name": "WI TREASURY SEC. 0.000000% 02/19/2026",
        "value": "8154137.52",
        "weight": "0.15323822",
        "shared": true
      },
      {
        "name": "U.S. Treasury Bills",
        "value": "7731193.02",
        "weight": "0.14528996",
        "shared": true
      },
      {
        "name": "US ULTRA BOND CBT Sep25",
        "value": "5366140.09",
        "weight": "0.10084424",
        "shared": true
      },
      {
        "name": "U.S. Treasury Bills",
        "value": "4289129.85",
        "weight": "0.08060431",
        "shared": true
      },
      {
        "name": "FRST AM-GV OB-X",
        "value": "1231314.25",
        "weight": "0.02313971",
        "shared": true
      },
      {
        "name": "U.S. Treasury Bills",
        "value": "937799.45",
        "weight": "0.01762378",
        "shared": true
      }
    ],
    "b_top": [
      {
        "name": "U.S. Treasury Bills",
        "value": "27260967.67",
        "weight": "0.45648457",
        "shared": true
      },
      {
        "name": "U.S. Treasury Bills",
        "value": "10534237.19",
        "weight": "0.17639567",
        "shared": true
      },
      {
        "name": "U.S. Treasury Bills",
        "value": "9485023.93",
        "weight": "0.15882661",
        "shared": true
      },
      {
        "name": "U.S. Treasury Bills",
        "value": "7671278.97",
        "weight": "0.12845547",
        "shared": true
      },
      {
        "name": "WI TREASURY SEC. 0.000000% 02/19/2026",
        "value": "3458121.00",
        "weight": "0.05790619",
        "shared": true
      },
      {
        "name": "FRST AM-GV OB-X",
        "value": "1043413.54",
        "weight": "0.01747195",
        "shared": true
      },
      {
        "name": "US ULTRA BOND CBT Sep25",
        "value": "266320.05",
        "weight": "0.00445953",
        "shared": true
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000894189-26-011038",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1924868/000089418926011038/0000894189-26-011038-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0000894189-26-011019",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1924868/000089418926011019/0000894189-26-011019-index.htm"
    }
  ]
}