{
  "page": "compare",
  "query": {
    "a": "IBMN",
    "b": "JMST"
  },
  "retrieved_at": "2026-07-07T18:43:18+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": "iShares iBonds Dec 2025 Term Muni Bond ETF",
    "ticker": "IBMN",
    "slug": "IBMN",
    "series_id": "S000063114",
    "html_url": "https://fundwatcher.app/funds/IBMN/"
  },
  "fund_b": {
    "name": "JPMorgan Ultra-Short Municipal Income ETF",
    "ticker": "JMST",
    "slug": "JMST",
    "series_id": "S000063269",
    "html_url": "https://fundwatcher.app/funds/JMST/"
  },
  "overlap": {
    "coverage_a_by_b": "0.02300739527793651138058454128",
    "coverage_b_by_a": "0.02300739527793651138058454129",
    "shared_count": 4,
    "as_of": {
      "a": "2025-10-31",
      "b": "2026-02-28"
    },
    "a_top": [
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        "name": "Rhode Island Health & Educational Building Corp., Series 2005A",
        "value": "15000000.00",
        "weight": "0.03928806",
        "shared": false
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      {
        "name": "UNIV OF MICHIGAN MI VARIABLE-GEN-SER A",
        "value": "15000000.00",
        "weight": "0.03928806",
        "shared": false
      },
      {
        "name": "HOUSTON TX UTILITY SYS REVENUE CITY OF HOUSTON TX COMBINED UTILITY SYSTEM REVENUE",
        "value": "15000000.00",
        "weight": "0.03928806",
        "shared": true
      },
      {
        "name": "Orange County Water District, Series 2003A",
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        "shared": false
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      {
        "name": "Arizona Board of Regents, Series 2025C",
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        "weight": "0.03064469",
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      {
        "name": "OHIO ST UNIV-D-2-REF",
        "value": "11160000.00",
        "weight": "0.02923032",
        "shared": false
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      {
        "name": "Long Island Power Authority, Series 2023D",
        "value": "10000000.00",
        "weight": "0.02619204",
        "shared": false
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      {
        "name": "WA KINUTL 01/01/2042",
        "value": "10000000.00",
        "weight": "0.02619204",
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      {
        "name": "OHIO ST UNIV REGD V/R B/E 2.15000000",
        "value": "10000000.00",
        "weight": "0.02619204",
        "shared": false
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      {
        "name": "DT OF COLUMBIA-C-2",
        "value": "10000000.00",
        "weight": "0.02619204",
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      {
        "name": "NYC MUNI WTR FIN-BB4",
        "value": "8500000.00",
        "weight": "0.02226324",
        "shared": false
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      {
        "name": "Massachusetts Water Resources Authority, Series 2025E",
        "value": "7500000.00",
        "weight": "0.01964403",
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      {
        "name": "MET TRANSPRTN AUTH NY REVENUE METROPOLITAN TRANSPORTATION AUTHORITY",
        "value": "7300000.00",
        "weight": "0.01912019",
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      {
        "name": "BATTERY PARK NY 19D1 Q=TD V1",
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        "weight": "0.01833443",
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      {
        "name": "BATTERY PARK CITY NY AUTH BATTERY PARK CITY AUTHORITY",
        "value": "6750000.00",
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      {
        "name": "COLORADO ST BRD OF GOVERNORS UNIV ENTERPRISE SYS REVENUE",
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        "shared": false
      },
      {
        "name": "Pennsylvania Turnpike Commission, Series 2023B",
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        "weight": "0.01571522",
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      },
      {
        "name": "City of Colorado Springs Utilities System, Series 2005A",
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      {
        "name": "MA ST DEPT TRANSPRTN",
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      {
        "name": "NYC VAR-SUBSER L-3",
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      },
      {
        "name": "NYC-F-5",
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      {
        "name": "Metropolitan Transportation Authority, Series 2012G-2",
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      {
        "name": "TRIBOROUGH BRIDGE-B2A",
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      {
        "name": "NYC TRANSTNL FIN-A4",
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      {
        "name": "Pennsylvania Turnpike Commission, Series 2020A",
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        "weight": "0.01309602",
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      {
        "name": "NYC TRANS FIN AUTH-C4",
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      {
        "name": "NYC W/S ADJ-2ND-CC-1",
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      {
        "name": "MA TRANSN-VAR-SR-A1",
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      {
        "name": "University of Delaware, Series 2024B",
        "value": "4100000.00",
        "weight": "0.01073874",
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      {
        "name": "District of Columbia Water & Sewer Authority, Series 2024B, Sub-Series B-1",
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        "name": "NYC TRANSITIONAL A-2",
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        "name": "HOUSTON TX UTILITY SYS REVENUE REGD V/R B/E 3.45000000",
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      },
      {
        "name": "NYC WTR-AA-2",
        "value": "3150000.00",
        "weight": "0.00825049",
        "shared": true
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      {
        "name": "Pennsylvania Turnpike Commission, Turnpike Revenue Bonds, Variable Rate Series 2020",
        "value": "3100000.00",
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      {
        "name": "PORT TACOMA WASH REV SUB LIEN BDS VAR, Due 12/01/2044",
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        "weight": "0.00785761",
        "shared": false
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      {
        "name": "Pennsylvania Turnpike Commission, Series 2019-2",
        "value": "3000000.00",
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      {
        "name": "MET TRANSPRTN-E3",
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        "weight": "0.00667897",
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      {
        "name": "Massachusetts School Building Authority, Series 2016A",
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        "weight": "0.00648695",
        "shared": false
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        "name": "State of Illinois, Series D",
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        "weight": "0.00618132",
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      {
        "name": "WISCONSIN ST",
        "value": "2200000.00",
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      {
        "name": "South Carolina Public Service Authority, Series 2025B",
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      {
        "name": "Dallas Area Rapid Transit, Series 2019",
        "value": "2008229.05",
        "weight": "0.00525996",
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      {
        "name": "City of Cincinnati Water System, Series B",
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        "shared": false
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      {
        "name": "Will (County of), IL, Series 2016, GO Bonds",
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        "weight": "0.00524198",
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      {
        "name": "MET TRANSPRTN AUTH-A2",
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        "weight": "0.00523841",
        "shared": false
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      {
        "name": "COLORADO SPRINGS CO UTILITIES REVENUE",
        "value": "1725000.00",
        "weight": "0.00451813",
        "shared": true
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      {
        "name": "TRIBOROUGH NY BRIDGE & TUNNEL AUTH REVENUES",
        "value": "1675000.00",
        "weight": "0.00438717",
        "shared": false
      },
      {
        "name": "PREREF CENTRL PUGET SOUND WA REGL TRA REGD B/E PREREFUNDED 11/01/25 @ 100 5.00000000",
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        "weight": "0.00399429",
        "shared": false
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      {
        "name": "NJ ECON DEV AUTH-A",
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        "name": "JPMorgan Institutional Tax Free Money Market Fund, Class IM",
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      {
        "name": "NYC MUNI WTR FIN AUTH",
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      {
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      {
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      {
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      {
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      {
        "name": "NYC TRANSTNL-C6-VAR",
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        "weight": "0.00654487",
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      {
        "name": "HOUSTON TX UTILITY SYS REVENUE CITY OF HOUSTON TX COMBINED UTILITY SYSTEM REVENUE",
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        "shared": true
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      {
        "name": "NYC GEN OBLIG-A-4",
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      {
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      {
        "name": "Pennsylvania Turnpike Commission, Turnpike Revenue Bonds, Variable Rate Series 2020",
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      {
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      {
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      {
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      {
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      {
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      {
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      {
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      {
        "name": "VALDEZ AK MARINE TERMINAL REVE VALTRN 05/31 ADJUSTABLE VAR",
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      {
        "name": "DELAWARE VLY REG-B",
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        "name": "CALIFORNIA ST INFRASTRUCTURE & ECON DEV BANK REVENUE",
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      },
      {
        "name": "COLORADO ST HLTH FACS AUTH REV REGD V/R B/E 2.65000000",
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      {
        "name": "Connecticut Housing Finance Authority, Housing Mortgage Finance Program, Series 2025, Subseries C-3",
        "value": "24680000.00",
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      },
      {
        "name": "MONMOUTH COUNTY IMPROVEMENT AUTHORITY/THE",
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      },
      {
        "name": "City of Houston",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0002071691-25-009494",
      "as_of": "2025-10-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1100663/000207169125009494/0002071691-25-009494-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0002071691-26-009312",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1485894/000207169126009312/0002071691-26-009312-index.htm"
    }
  ]
}