{
  "page": "compare",
  "query": {
    "a": "IBMS",
    "b": "MUB"
  },
  "retrieved_at": "2026-07-07T15:46:22+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 2030 Term Muni Bond ETF",
    "ticker": "IBMS",
    "slug": "IBMS",
    "series_id": "S000085095",
    "html_url": "https://fundwatcher.app/funds/IBMS/"
  },
  "fund_b": {
    "name": "iShares National Muni Bond ETF",
    "ticker": "MUB",
    "slug": "MUB",
    "series_id": "S000018861",
    "html_url": "https://fundwatcher.app/funds/MUB/"
  },
  "overlap": {
    "coverage_a_by_b": "0.02645697036245794415334520729",
    "coverage_b_by_a": "0.02645697036245794415334520729",
    "shared_count": 136,
    "as_of": {
      "a": "2026-01-31",
      "b": "2026-02-28"
    },
    "a_top": [
      {
        "name": "BLKR-LI MUNI-INS",
        "value": "1725764.27",
        "weight": "0.00675881",
        "shared": true
      },
      {
        "name": "UNIV OF CALIFORNIA CA REVENUES REGD N/C B/E 5.00000000",
        "value": "1692671.09",
        "weight": "0.00662920",
        "shared": true
      },
      {
        "name": "CT HLTH & EDUCTNL-B-1",
        "value": "1607316.45",
        "weight": "0.00629492",
        "shared": true
      },
      {
        "name": "State of California",
        "value": "1437961.95",
        "weight": "0.00563166",
        "shared": true
      },
      {
        "name": "NEW YORK NY",
        "value": "1270271.11",
        "weight": "0.00497491",
        "shared": false
      },
      {
        "name": "MORRIS CNTY NJ",
        "value": "1249228.37",
        "weight": "0.00489250",
        "shared": false
      },
      {
        "name": "State of Hawaii Airports System Revenue",
        "value": "1197920.90",
        "weight": "0.00469156",
        "shared": false
      },
      {
        "name": "State of New Jersey, Series 2020A",
        "value": "1135106.72",
        "weight": "0.00444555",
        "shared": true
      },
      {
        "name": "ALABAMA ST PUBLIC SCH & CLG AUTH",
        "value": "1132943.58",
        "weight": "0.00443708",
        "shared": true
      },
      {
        "name": "TRIBOROUGH NY BRIDGE & TUNNEL AUTH PAYROLL MOBILITY TAX",
        "value": "926349.11",
        "weight": "0.00362797",
        "shared": true
      },
      {
        "name": "CALIFORNIA ST-REF",
        "value": "872738.89",
        "weight": "0.00341801",
        "shared": false
      },
      {
        "name": "LOS ANGELES-E-REF",
        "value": "777713.93",
        "weight": "0.00304585",
        "shared": false
      },
      {
        "name": "State of California",
        "value": "769785.20",
        "weight": "0.00301480",
        "shared": true
      },
      {
        "name": "State of California, Series 2019",
        "value": "766757.57",
        "weight": "0.00300294",
        "shared": true
      },
      {
        "name": "Duval County Public Schools, Series 2022A",
        "value": "741594.93",
        "weight": "0.00290439",
        "shared": false
      },
      {
        "name": "Rancho Santiago Community College District",
        "value": "727154.60",
        "weight": "0.00284784",
        "shared": false
      },
      {
        "name": "Metropolitan Transit Authority of Harris County Sales & Use Tax",
        "value": "723279.31",
        "weight": "0.00283266",
        "shared": false
      },
      {
        "name": "State of California, Series 2018, GO Bonds",
        "value": "723197.63",
        "weight": "0.00283234",
        "shared": true
      },
      {
        "name": "PRV COL and UNV GA 5% 9/1/2030",
        "value": "718252.01",
        "weight": "0.00281297",
        "shared": true
      },
      {
        "name": "MASSACHUSETTS ST CLEAN WTR TRUST",
        "value": "709569.28",
        "weight": "0.00277897",
        "shared": false
      },
      {
        "name": "Honolulu (City & County of), HI (Honolulu Rail Transit), Series 2021, GO Bonds",
        "value": "703031.36",
        "weight": "0.00275336",
        "shared": false
      },
      {
        "name": "NYC TRANS FIN AUTH",
        "value": "692353.48",
        "weight": "0.00271154",
        "shared": false
      },
      {
        "name": "State of Maryland, Series 2020A-2",
        "value": "690389.28",
        "weight": "0.00270385",
        "shared": false
      },
      {
        "name": "CONROE TX INDEP SCH DIST",
        "value": "690038.25",
        "weight": "0.00270248",
        "shared": false
      },
      {
        "name": "BEVERLY HILLS USD CAB",
        "value": "688610.24",
        "weight": "0.00269688",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST",
        "value": "680592.81",
        "weight": "0.00266548",
        "shared": false
      },
      {
        "name": "LOS ANGELES WTR-A-REF",
        "value": "679671.13",
        "weight": "0.00266187",
        "shared": true
      },
      {
        "name": "MET TRANSPRTN AUTH NY REVENUE",
        "value": "677057.19",
        "weight": "0.00265164",
        "shared": true
      },
      {
        "name": "IL ST TOLL HWY AUTH",
        "value": "675696.38",
        "weight": "0.00264631",
        "shared": true
      },
      {
        "name": "NEW YORK NY",
        "value": "673817.29",
        "weight": "0.00263895",
        "shared": false
      },
      {
        "name": "State of Connecticut, Series 2021A",
        "value": "658447.56",
        "weight": "0.00257875",
        "shared": false
      },
      {
        "name": "State of California",
        "value": "641885.38",
        "weight": "0.00251389",
        "shared": true
      },
      {
        "name": "MANHATTAN BEACH CA UNIF SCH DIST",
        "value": "640964.32",
        "weight": "0.00251028",
        "shared": false
      },
      {
        "name": "State of Illinois, Series 2024B",
        "value": "640408.45",
        "weight": "0.00250811",
        "shared": true
      },
      {
        "name": "CORPUS CHRISTI TX",
        "value": "640092.73",
        "weight": "0.00250687",
        "shared": false
      },
      {
        "name": "IL ST TOLL HWY AUTH",
        "value": "611065.93",
        "weight": "0.00239319",
        "shared": true
      },
      {
        "name": "STATE OF ILLINOIS",
        "value": "609242.87",
        "weight": "0.00238605",
        "shared": false
      },
      {
        "name": "CENTRL FL EXPRESSWAY AUTH SR LIEN REVENUE",
        "value": "595250.95",
        "weight": "0.00233125",
        "shared": true
      },
      {
        "name": "DEL VALLE TX INDEP SCH DIST",
        "value": "592831.36",
        "weight": "0.00232177",
        "shared": false
      },
      {
        "name": "Hillsborough County School Board, Series 2018",
        "value": "590731.68",
        "weight": "0.00231355",
        "shared": false
      },
      {
        "name": "UTAH ST BLDG OWNERSHIP AUTH LEASE REVENUE",
        "value": "581475.77",
        "weight": "0.00227730",
        "shared": false
      },
      {
        "name": "NEW YORK ST DORM AUTH REVENUES NON ST SUPPORTED DEBT",
        "value": "581005.82",
        "weight": "0.00227546",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST-REF",
        "value": "576305.96",
        "weight": "0.00225705",
        "shared": false
      },
      {
        "name": "NY DORM AUTH-C-REF",
        "value": "575542.29",
        "weight": "0.00225406",
        "shared": false
      },
      {
        "name": "PALM BEACH SCH-A-COPS",
        "value": "570816.64",
        "weight": "0.00223555",
        "shared": false
      },
      {
        "name": "NEW YORK ST DORM AUTH REVENUES NON ST SUPPORTED DEBT",
        "value": "570687.77",
        "weight": "0.00223505",
        "shared": false
      },
      {
        "name": "MA ST-REF-A",
        "value": "560987.95",
        "weight": "0.00219706",
        "shared": true
      },
      {
        "name": "E-470 Public Highway Authority, Series B",
        "value": "558340.84",
        "weight": "0.00218669",
        "shared": true
      },
      {
        "name": "MET NASHVILLE TN ARPT AUTH ARPT REVENUE",
        "value": "556308.00",
        "weight": "0.00217873",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST SCH BLDG AUTH SALES TAX REVENUE",
        "value": "555539.90",
        "weight": "0.00217572",
        "shared": false
      }
    ],
    "b_top": [
      {
        "name": "BLKR-LI MUNI-INS",
        "value": "242983297.79",
        "weight": "0.00564953",
        "shared": true
      },
      {
        "name": "UNIV OF TEXAS TX UNIV REVENUES UNIHGR 08/36 FIXED 5",
        "value": "90014038.63",
        "weight": "0.00209289",
        "shared": false
      },
      {
        "name": "Connecticut State Health & Educational Facilities Authority, Series 2017C-4",
        "value": "85000000.00",
        "weight": "0.00197631",
        "shared": false
      },
      {
        "name": "City of Atlanta Water & Wastewater, Series 2015",
        "value": "82282742.63",
        "weight": "0.00191313",
        "shared": false
      },
      {
        "name": "TX NWTSCD 5.25 02/15/2055",
        "value": "69469565.73",
        "weight": "0.00161521",
        "shared": false
      },
      {
        "name": "NYS TWY PIT 5% 3/15/2048",
        "value": "69237874.05",
        "weight": "0.00160983",
        "shared": false
      },
      {
        "name": "HOUSTON TX HGR EDU FIN CORP REGD N/C B/E 5.00000000",
        "value": "64910233.40",
        "weight": "0.00150921",
        "shared": false
      },
      {
        "name": "NY ST DORM AUTH PIT 20D SF 4.0% 02-15-47",
        "value": "60673678.11",
        "weight": "0.00141070",
        "shared": false
      },
      {
        "name": "OHIO ST UNIV REGD N/C B/E 5.00000000",
        "value": "59853495.00",
        "weight": "0.00139163",
        "shared": false
      },
      {
        "name": "STATE OF CALIFORNIA 5.0% 09-01-31",
        "value": "57721625.00",
        "weight": "0.00134207",
        "shared": false
      },
      {
        "name": "State of New Jersey, Series 2020A",
        "value": "57393987.08",
        "weight": "0.00133445",
        "shared": false
      },
      {
        "name": "WASHINGTON ST-R-2022",
        "value": "56388923.70",
        "weight": "0.00131108",
        "shared": false
      },
      {
        "name": "Pennsylvania Turnpike Commission, Series 2019-2",
        "value": "52715000.00",
        "weight": "0.00122566",
        "shared": false
      },
      {
        "name": "Chicago Transit Authority, Series A",
        "value": "51559865.00",
        "weight": "0.00119880",
        "shared": false
      },
      {
        "name": "NJ EDUCTNL FACS AUTH",
        "value": "50750927.89",
        "weight": "0.00117999",
        "shared": false
      },
      {
        "name": "Washoe County School District, Series 2017C",
        "value": "50701621.71",
        "weight": "0.00117885",
        "shared": false
      },
      {
        "name": "NJ NJSEDU 07/01/2064",
        "value": "50584806.00",
        "weight": "0.00117613",
        "shared": false
      },
      {
        "name": "E CO AWP JT PWRS-A-1",
        "value": "50433597.13",
        "weight": "0.00117262",
        "shared": false
      },
      {
        "name": "STATE OF CALIFORNIA 5.0% 10-01-36",
        "value": "49714072.80",
        "weight": "0.00115589",
        "shared": false
      },
      {
        "name": "State of Illinois, Series D",
        "value": "49472745.11",
        "weight": "0.00115028",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST-B",
        "value": "48880005.15",
        "weight": "0.00113649",
        "shared": false
      },
      {
        "name": "District of Columbia, Series 2025A",
        "value": "48535124.40",
        "weight": "0.00112847",
        "shared": false
      },
      {
        "name": "NYC WTR 5.25% 6/15/2047",
        "value": "46900559.39",
        "weight": "0.00109047",
        "shared": false
      },
      {
        "name": "MA ST 5% 11/1/52",
        "value": "46850958.90",
        "weight": "0.00108932",
        "shared": false
      },
      {
        "name": "NEW YORK NY",
        "value": "46632124.06",
        "weight": "0.00108423",
        "shared": false
      },
      {
        "name": "CALIFORNIA ST EDUCTNL FACS AUTH REVENUE",
        "value": "44655033.22",
        "weight": "0.00103826",
        "shared": false
      },
      {
        "name": "San Diego Unified School District, Series 2020D-2",
        "value": "44525588.74",
        "weight": "0.00103525",
        "shared": false
      },
      {
        "name": "Colorado Springs (City of), CO, Series 2024 A, RB",
        "value": "44190056.65",
        "weight": "0.00102745",
        "shared": false
      },
      {
        "name": "Triborough Bridge & Tunnel Authority, Series 2024A",
        "value": "41831145.85",
        "weight": "0.00097260",
        "shared": false
      },
      {
        "name": "NJ TRN FD CAB-SER C",
        "value": "41772555.00",
        "weight": "0.00097124",
        "shared": false
      },
      {
        "name": "Los Angeles Unified School District, Series 2020 RYQ, GO Bonds",
        "value": "41612943.74",
        "weight": "0.00096753",
        "shared": false
      },
      {
        "name": "UNIV OF CA REGENTS",
        "value": "41261032.09",
        "weight": "0.00095935",
        "shared": false
      },
      {
        "name": "NY ST UDC PIT REV 20A SF 4.0% 03-15-49",
        "value": "41113057.26",
        "weight": "0.00095591",
        "shared": false
      },
      {
        "name": "NYC WTR 5% 6/15/48",
        "value": "40539856.36",
        "weight": "0.00094258",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA CMWLTH",
        "value": "40532012.00",
        "weight": "0.00094240",
        "shared": false
      },
      {
        "name": "TRIBOROUGH NY BRIDGE   TUNNEL TRBTRN 05/51 FIXED 5",
        "value": "40465136.40",
        "weight": "0.00094084",
        "shared": false
      },
      {
        "name": "New York State Thruway Authority, Series 2021A-1",
        "value": "40194987.30",
        "weight": "0.00093456",
        "shared": false
      },
      {
        "name": "NY ST THRWY AUTH",
        "value": "40186948.00",
        "weight": "0.00093437",
        "shared": false
      },
      {
        "name": "OH WTR DEV AUTH-C",
        "value": "40090000.00",
        "weight": "0.00093212",
        "shared": false
      },
      {
        "name": "State of Maryland, Series 2023A",
        "value": "39801258.00",
        "weight": "0.00092541",
        "shared": false
      },
      {
        "name": "Metropolitan Government of Nashville & Davidson County, Series 2024B",
        "value": "39748070.60",
        "weight": "0.00092417",
        "shared": false
      },
      {
        "name": "New York State Thruway Authority, Series 2025A",
        "value": "39711711.77",
        "weight": "0.00092332",
        "shared": false
      },
      {
        "name": "Pennsylvania Turnpike Commission, Turnpike Revenue Bonds, Variable Rate Series 2020",
        "value": "39250000.00",
        "weight": "0.00091259",
        "shared": false
      },
      {
        "name": "Maryland (State of) Stadium Authority (Baltimore City Public Schools), Series 2016, RB",
        "value": "38930691.25",
        "weight": "0.00090517",
        "shared": false
      },
      {
        "name": "New Orleans, Louisiana, General Obligation Bonds, Public Improvement Series 2024A",
        "value": "38431823.56",
        "weight": "0.00089357",
        "shared": false
      },
      {
        "name": "MA ST-A",
        "value": "38201589.27",
        "weight": "0.00088821",
        "shared": false
      },
      {
        "name": "MBTA SLS TAX 5.25% 7/1/2052",
        "value": "37926722.94",
        "weight": "0.00088182",
        "shared": false
      },
      {
        "name": "UNIV OF CA REGENTS",
        "value": "37879553.00",
        "weight": "0.00088073",
        "shared": false
      },
      {
        "name": "PROSPER TX INDEP SCH DIST REGD OID B/E PSF-GTD 4.00000000",
        "value": "37790322.40",
        "weight": "0.00087865",
        "shared": false
      },
      {
        "name": "Ector County, Texas, Certificates of Obligation, Series 2024",
        "value": "37460608.19",
        "weight": "0.00087098",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001410368-26-031746",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1100663/000141036826031746/0001410368-26-031746-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0002071691-26-008205",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1100663/000207169126008205/0002071691-26-008205-index.htm"
    }
  ]
}