{
  "page": "compare",
  "query": {
    "a": "JMST",
    "b": "OSTAX"
  },
  "retrieved_at": "2026-07-07T19:05:32+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": "JPMorgan Ultra-Short Municipal Income ETF",
    "ticker": "JMST",
    "slug": "JMST",
    "series_id": "S000063269",
    "html_url": "https://fundwatcher.app/funds/JMST/"
  },
  "fund_b": {
    "name": "JPMorgan Short-Intermediate Municipal Bond Fund",
    "ticker": "OSTAX",
    "slug": "OSTAX",
    "series_id": "S000003499",
    "html_url": "https://fundwatcher.app/funds/OSTAX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.1154053688269617150362274949",
    "coverage_b_by_a": "0.1154053688269617150362274949",
    "shared_count": 80,
    "as_of": {
      "a": "2026-02-28",
      "b": "2026-02-28"
    },
    "a_top": [
      {
        "name": "JPMorgan Institutional Tax Free Money Market Fund, Class IM",
        "value": "820987514.18",
        "weight": "0.13433149",
        "shared": true
      },
      {
        "name": "NYC MUNI WTR FIN AUTH",
        "value": "65000000.00",
        "weight": "0.01063542",
        "shared": false
      },
      {
        "name": "WASHINGTON ST-R-2026A",
        "value": "58514028.03",
        "weight": "0.00957417",
        "shared": false
      },
      {
        "name": "State of Minnesota, Various Purpose, Series 2025D",
        "value": "50297402.52",
        "weight": "0.00822975",
        "shared": false
      },
      {
        "name": "TRIBOROUGH NY BRIDGE & TUNNEL AUTH REVENUES",
        "value": "47593694.15",
        "weight": "0.00778737",
        "shared": false
      },
      {
        "name": "Township of Woodbridge",
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        "weight": "0.00742486",
        "shared": false
      },
      {
        "name": "Maryland Health & Higher Educational Facilities Authority, Series 2025 C-1",
        "value": "45000000.00",
        "weight": "0.00736298",
        "shared": false
      },
      {
        "name": "Tarrant County Cultural Education Facilities Finance Corp., Series 2012, RB",
        "value": "42920000.00",
        "weight": "0.00702265",
        "shared": false
      },
      {
        "name": "County of Hamilton Sales Tax",
        "value": "42598229.52",
        "weight": "0.00697000",
        "shared": false
      },
      {
        "name": "NYC TRANSTNL-C6-VAR",
        "value": "40000000.00",
        "weight": "0.00654487",
        "shared": false
      },
      {
        "name": "HOUSTON TX UTILITY SYS REVENUE CITY OF HOUSTON TX COMBINED UTILITY SYSTEM REVENUE",
        "value": "40000000.00",
        "weight": "0.00654487",
        "shared": false
      },
      {
        "name": "NYC GEN OBLIG-A-4",
        "value": "40000000.00",
        "weight": "0.00654487",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "40000000.00",
        "weight": "0.00654487",
        "shared": false
      },
      {
        "name": "City of Bristol",
        "value": "38046710.56",
        "weight": "0.00622527",
        "shared": false
      },
      {
        "name": "Pennsylvania Turnpike Commission, Turnpike Revenue Bonds, Variable Rate Series 2020",
        "value": "38000000.00",
        "weight": "0.00621763",
        "shared": false
      },
      {
        "name": "Township of Hamilton",
        "value": "37376308.50",
        "weight": "0.00611558",
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      },
      {
        "name": "Township of Parsippany-Troy Hills",
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      },
      {
        "name": "Township of Livingston",
        "value": "36117312.60",
        "weight": "0.00590958",
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      },
      {
        "name": "City of Hudson, Limited Tax",
        "value": "35781467.29",
        "weight": "0.00585463",
        "shared": false
      },
      {
        "name": "SAINT LUCIE CNTY FL POLL CONTR COUNTY OF ST LUCIE FL",
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        "weight": "0.00584948",
        "shared": false
      },
      {
        "name": "NYC WTR-AA-2",
        "value": "35000000.00",
        "weight": "0.00572676",
        "shared": false
      },
      {
        "name": "Connecticut State, Special Tax Obligation Bonds, Transportation Infrastructure Purposes, Series 2025A",
        "value": "34624721.25",
        "weight": "0.00566536",
        "shared": true
      },
      {
        "name": "State of Louisiana, Series 2023 A-2",
        "value": "33900000.00",
        "weight": "0.00554678",
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      {
        "name": "San Antonio Water System, Subordinate Lien, Series 2024A",
        "value": "33300000.00",
        "weight": "0.00544861",
        "shared": false
      },
      {
        "name": "MICHIGAN ST BLDG AUTH REVENUE",
        "value": "33000000.00",
        "weight": "0.00539952",
        "shared": false
      },
      {
        "name": "Maine School Administrative District No. 51, Series 2025B",
        "value": "32920059.25",
        "weight": "0.00538644",
        "shared": false
      },
      {
        "name": "COLORADO SPRINGS CO UTILITIES REVENUE",
        "value": "32400000.00",
        "weight": "0.00530135",
        "shared": false
      },
      {
        "name": "Township of Teaneck",
        "value": "31810928.66",
        "weight": "0.00520496",
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      {
        "name": "Clark County School District, Series 2025B",
        "value": "31595697.25",
        "weight": "0.00516975",
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      {
        "name": "Spartanburg County School District No. 7",
        "value": "31325372.90",
        "weight": "0.00512552",
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      {
        "name": "Township of Cherry Hill",
        "value": "30251857.23",
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      {
        "name": "City of Albany",
        "value": "30025077.00",
        "weight": "0.00491276",
        "shared": false
      },
      {
        "name": "VALDEZ AK MARINE TERMINAL REVE VALTRN 05/31 ADJUSTABLE VAR",
        "value": "30000000.00",
        "weight": "0.00490866",
        "shared": false
      },
      {
        "name": "DELAWARE VLY REG-B",
        "value": "30000000.00",
        "weight": "0.00490866",
        "shared": false
      },
      {
        "name": "TNDR OPT-FLTR-046",
        "value": "30000000.00",
        "weight": "0.00490866",
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      },
      {
        "name": "CALIFORNIA ST INFRASTRUCTURE & ECON DEV BANK REVENUE",
        "value": "28482275.85",
        "weight": "0.00466032",
        "shared": false
      },
      {
        "name": "COLORADO ST HLTH FACS AUTH REV REGD V/R B/E 2.65000000",
        "value": "28100000.00",
        "weight": "0.00459777",
        "shared": false
      },
      {
        "name": "JERSEY CITY NJ",
        "value": "26877169.34",
        "weight": "0.00439769",
        "shared": false
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      {
        "name": "Township of Edison",
        "value": "26172019.32",
        "weight": "0.00428231",
        "shared": false
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      {
        "name": "Township of West Windsor",
        "value": "25969663.88",
        "weight": "0.00424920",
        "shared": false
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      {
        "name": "BLACK BELT ENERGY GAS FRN",
        "value": "25718728.94",
        "weight": "0.00420815",
        "shared": false
      },
      {
        "name": "Town of South Kingstown, Series 2025-1",
        "value": "25127257.50",
        "weight": "0.00411137",
        "shared": false
      },
      {
        "name": "Colorado (State of) Health Facilities Authority (Intermountain Healthcare), Series 2024, RB",
        "value": "25000000.00",
        "weight": "0.00409055",
        "shared": false
      },
      {
        "name": "Alaska Housing Finance Corp., Home Mortgage, Series 2007A",
        "value": "25000000.00",
        "weight": "0.00409055",
        "shared": false
      },
      {
        "name": "University of Colorado Hospital Authority, Series 2018, RB",
        "value": "25000000.00",
        "weight": "0.00409055",
        "shared": false
      },
      {
        "name": "City of Jacksonville, Health Care Facilities, Baptist Health",
        "value": "25000000.00",
        "weight": "0.00409055",
        "shared": false
      },
      {
        "name": "City of Sea Isle City",
        "value": "24931232.87",
        "weight": "0.00407929",
        "shared": false
      },
      {
        "name": "Connecticut Housing Finance Authority, Housing Mortgage Finance Program, Series 2025, Subseries C-3",
        "value": "24680000.00",
        "weight": "0.00403819",
        "shared": false
      },
      {
        "name": "MONMOUTH COUNTY IMPROVEMENT AUTHORITY/THE",
        "value": "24556398.70",
        "weight": "0.00401796",
        "shared": false
      },
      {
        "name": "City of Houston",
        "value": "23508318.31",
        "weight": "0.00384647",
        "shared": false
      }
    ],
    "b_top": [
      {
        "name": "JPMorgan Institutional Tax Free Money Market Fund, Class IM",
        "value": "44215312.34",
        "weight": "0.05325983",
        "shared": true
      },
      {
        "name": "WA ST HLTH CAR 5% 8/1/2049 MT",
        "value": "15016188.00",
        "weight": "0.01808784",
        "shared": true
      },
      {
        "name": "TAMPA BAY WTR-A-RF/IM",
        "value": "8990468.00",
        "weight": "0.01082952",
        "shared": true
      },
      {
        "name": "TX TMGUTL 01/01/2054",
        "value": "8391455.28",
        "weight": "0.01010798",
        "shared": true
      },
      {
        "name": "NORTH CAROLINA HSG FIN AGY HOM REGD B/E GNMA/FN 6.50000000",
        "value": "8174020.40",
        "weight": "0.00984607",
        "shared": false
      },
      {
        "name": "State of Ohio, Common School, Series 2023A",
        "value": "8161020.65",
        "weight": "0.00983041",
        "shared": false
      },
      {
        "name": "MO HLTH & EDU FACS AU",
        "value": "7916118.00",
        "weight": "0.00953541",
        "shared": true
      },
      {
        "name": "Comal Independent School District, Unlimited Tax",
        "value": "7567165.32",
        "weight": "0.00911508",
        "shared": true
      },
      {
        "name": "TX DALAPT 11/01/2050",
        "value": "7509826.10",
        "weight": "0.00904601",
        "shared": false
      },
      {
        "name": "Chicago Midway International Airport, Senior Lien, Series 2023C",
        "value": "7425379.07",
        "weight": "0.00894429",
        "shared": false
      },
      {
        "name": "TRIBOROUGH NY BRIDGE & TUNNEL REGD N/C B/E 5.00000000",
        "value": "7213754.10",
        "weight": "0.00868937",
        "shared": true
      },
      {
        "name": "STATE OF NEW YORK SALES TAX REVENUE 5.0% 03-15-30",
        "value": "6848563.37",
        "weight": "0.00824948",
        "shared": false
      },
      {
        "name": "TN TGYPWR 12/01/2051",
        "value": "6700954.00",
        "weight": "0.00807168",
        "shared": false
      },
      {
        "name": "Pennsylvania State, General Obligation Bonds, First Series 2024",
        "value": "6551650.19",
        "weight": "0.00789183",
        "shared": false
      },
      {
        "name": "INDIANA ST FIN AUTH ENVRNMNTL REGD B/E 1.40000000",
        "value": "6535848.90",
        "weight": "0.00787280",
        "shared": false
      },
      {
        "name": "SAN ANTONIO-B-REV-REF",
        "value": "6489772.80",
        "weight": "0.00781730",
        "shared": true
      },
      {
        "name": "CURATORS OF THE UNIV OF MISSOURI MO SYS FACS REVENUE",
        "value": "6419206.67",
        "weight": "0.00773230",
        "shared": false
      },
      {
        "name": "EQUITABLE SCHOOL REVOLVING FUND LLC OBLIGATED GROUP 5.0% 11-01-28",
        "value": "6320385.00",
        "weight": "0.00761326",
        "shared": false
      },
      {
        "name": "GRAND PKWY TRANSPRTN",
        "value": "6256365.00",
        "weight": "0.00753614",
        "shared": false
      },
      {
        "name": "NEW YORK ST DORM AUTH REVENUES NON ST SUPPORTED DEBT",
        "value": "6236019.64",
        "weight": "0.00751164",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "5979076.40",
        "weight": "0.00720213",
        "shared": false
      },
      {
        "name": "CYPRESS-FAIRBANKS ISD",
        "value": "5542957.57",
        "weight": "0.00667680",
        "shared": false
      },
      {
        "name": "Arizona (State of) Sports & Tourism Authority, Series 2022, Ref. RB",
        "value": "5514424.00",
        "weight": "0.00664243",
        "shared": false
      },
      {
        "name": "State of Connecticut, Series 2025D",
        "value": "5477475.00",
        "weight": "0.00659793",
        "shared": false
      },
      {
        "name": "Springfield (City of), IL, Series 2024, Ref. RB",
        "value": "5463960.00",
        "weight": "0.00658165",
        "shared": false
      },
      {
        "name": "Montgomery (County of), PA Industrial Development Authority (Constellation Energy Generation, LLC), Series 2023 B, Ref. RB",
        "value": "5455257.60",
        "weight": "0.00657116",
        "shared": false
      },
      {
        "name": "Health Educational and Housing Facility Board of the City of Memphis (The), Arbors Hickory Ridge Project, Series 2012",
        "value": "5439923.77",
        "weight": "0.00655269",
        "shared": true
      },
      {
        "name": "SOUTHCENTRL PA GEN AUTH REVENUE",
        "value": "5414915.50",
        "weight": "0.00652257",
        "shared": true
      },
      {
        "name": "NEW YORK ST DORM AUTH REVENUES NON ST SUPPORTED DEBT",
        "value": "5413936.46",
        "weight": "0.00652139",
        "shared": false
      },
      {
        "name": "NEW MEXICO ST FIN AUTH ST TRANSPRTN REVENUE",
        "value": "5405821.55",
        "weight": "0.00651162",
        "shared": false
      },
      {
        "name": "NJ TRANSPRTN-A-REF",
        "value": "5390006.77",
        "weight": "0.00649257",
        "shared": false
      },
      {
        "name": "Cypress-Fairbanks Independent School District, Unlimited Tax",
        "value": "5371258.68",
        "weight": "0.00646998",
        "shared": false
      },
      {
        "name": "MTRO WA DC ARPT 5% 10/1/2028 @",
        "value": "5323577.00",
        "weight": "0.00641255",
        "shared": true
      },
      {
        "name": "SOUTHEAST ENERGY AUTH VAR",
        "value": "5254701.50",
        "weight": "0.00632958",
        "shared": false
      },
      {
        "name": "Cleveland County Educational Facilities Authority, Series 2021",
        "value": "5246117.52",
        "weight": "0.00631924",
        "shared": false
      },
      {
        "name": "ILLINOIS ST HSG DEV AUTH REVENUE",
        "value": "5226285.77",
        "weight": "0.00629536",
        "shared": false
      },
      {
        "name": "Port Authority of New York and New Jersey, Consolidated, Series 246",
        "value": "5182166.50",
        "weight": "0.00624221",
        "shared": false
      },
      {
        "name": "WASTE MANAGEMENT INC (MPT) 4.6% 10-01-46",
        "value": "5026765.50",
        "weight": "0.00605502",
        "shared": false
      },
      {
        "name": "NJ TRANSPRTN-A-REF 5 6/31",
        "value": "4783585.83",
        "weight": "0.00576210",
        "shared": false
      },
      {
        "name": "Pennsylvania (Commonwealth of), Series 2024, GO Bonds",
        "value": "4538641.20",
        "weight": "0.00546705",
        "shared": false
      },
      {
        "name": "Maricopa County Pollution Control Corp., Series A",
        "value": "4449649.95",
        "weight": "0.00535985",
        "shared": false
      },
      {
        "name": "State of Illinois, Series 2024B",
        "value": "4418507.87",
        "weight": "0.00532234",
        "shared": false
      },
      {
        "name": "County of Miami-Dade Water and Sewer System, Series 2025B",
        "value": "4391286.40",
        "weight": "0.00528955",
        "shared": true
      },
      {
        "name": "MAIN STR NAT GA 5% MT",
        "value": "4356486.00",
        "weight": "0.00524763",
        "shared": false
      },
      {
        "name": "HOUSTON TX UTILITY SYS REVENUE REGD N/C B/E 5.00000000",
        "value": "4348829.82",
        "weight": "0.00523841",
        "shared": false
      },
      {
        "name": "District of Columbia, Series 2025A",
        "value": "4333493.25",
        "weight": "0.00521994",
        "shared": false
      },
      {
        "name": "Metropolitan Council, Series 2021 C, GO Bonds",
        "value": "4303646.11",
        "weight": "0.00518398",
        "shared": false
      },
      {
        "name": "County of Miami-Dade Water and Sewer System, Series 2025B",
        "value": "4285552.80",
        "weight": "0.00516219",
        "shared": true
      },
      {
        "name": "IRVING ISD-REF",
        "value": "4231058.68",
        "weight": "0.00509655",
        "shared": false
      },
      {
        "name": "NORTH CAROLINA ST HSG FIN AGYM REGD V/R B/E 5.00000000",
        "value": "4221677.60",
        "weight": "0.00508525",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "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"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0002071691-26-009306",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/763852/000207169126009306/0002071691-26-009306-index.htm"
    }
  ]
}