{
  "page": "compare",
  "query": {
    "a": "FSMB",
    "b": "NSMMX"
  },
  "retrieved_at": "2026-07-07T18:45:51+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": "First Trust Short Duration Managed Municipal ETF",
    "ticker": "FSMB",
    "slug": "FSMB",
    "series_id": "S000063445",
    "html_url": "https://fundwatcher.app/funds/FSMB/"
  },
  "fund_b": {
    "name": "Columbia Short Duration Municipal Bond Fund",
    "ticker": "NSMMX",
    "slug": "NSMMX",
    "series_id": "S000010778",
    "html_url": "https://fundwatcher.app/funds/NSMMX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.06122517738345578000706138779",
    "coverage_b_by_a": "0.06122517738345578000706138781",
    "shared_count": 21,
    "as_of": {
      "a": "2026-04-30",
      "b": "2026-01-31"
    },
    "a_top": [
      {
        "name": "Southeast Energy Authority, Alabama, Revenue Bonds Cooperative District Energy Supply Series 2024C",
        "value": "6372370.20",
        "weight": "0.01078087",
        "shared": false
      },
      {
        "name": "County of Utah UT",
        "value": "5000000.00",
        "weight": "0.00845907",
        "shared": false
      },
      {
        "name": "OH OHSDEV 11/01/2039",
        "value": "4805848.92",
        "weight": "0.00813060",
        "shared": true
      },
      {
        "name": "Wisconsin (State of) Public Finance Authority (Duke Energy Progress), Series 2022, Ref. RB",
        "value": "4281206.10",
        "weight": "0.00724301",
        "shared": false
      },
      {
        "name": "St. John the Baptist (Parish of), LA (Marathon Oil Corp.), Series 2017, Ref. RB",
        "value": "4026151.60",
        "weight": "0.00681150",
        "shared": false
      },
      {
        "name": "Main Street Energy, Inc., Series D",
        "value": "3895478.03",
        "weight": "0.00659043",
        "shared": false
      },
      {
        "name": "Palm Beach (County of), FL Health Facilities Authority (ACTS Retirement-Life Communities, Inc.), Series 2016, Ref. RB",
        "value": "3743929.08",
        "weight": "0.00633403",
        "shared": false
      },
      {
        "name": "NYC MUNI WTR FIN-BB",
        "value": "3500000.00",
        "weight": "0.00592135",
        "shared": false
      },
      {
        "name": "Public Energy Authority of Kentucky, Gas Supply Revenue Bonds, Refunding Series 2025A",
        "value": "3481712.58",
        "weight": "0.00589041",
        "shared": true
      },
      {
        "name": "Black Belt Energy Gas District",
        "value": "3440432.23",
        "weight": "0.00582057",
        "shared": false
      },
      {
        "name": "BLACK BELT ENERGY GAS VAR",
        "value": "3420591.24",
        "weight": "0.00578701",
        "shared": false
      },
      {
        "name": "NM MUNI ENERGY ACQ AU",
        "value": "3381642.53",
        "weight": "0.00572111",
        "shared": false
      },
      {
        "name": "NEW YORK ST HSG FIN AGY AFFORDABLE HSG REVENUE",
        "value": "3143053.75",
        "weight": "0.00531746",
        "shared": false
      },
      {
        "name": "LOS ANGELES CA DEPT OF ARPTS A REGD B/E AMT 5.00000000",
        "value": "3142415.10",
        "weight": "0.00531638",
        "shared": false
      },
      {
        "name": "ALLEGHENY HOSP DEV-A",
        "value": "3092031.90",
        "weight": "0.00523114",
        "shared": false
      },
      {
        "name": "WHITING IN ENVRNMNTL FACS REVE REGD V/R B/E AMT 5.00000000",
        "value": "3075758.09",
        "weight": "0.00520361",
        "shared": false
      },
      {
        "name": "MD CMNTY DEV-D-2",
        "value": "3035471.70",
        "weight": "0.00513545",
        "shared": true
      },
      {
        "name": "UNITED AIRLINES INC 4.0% 07-15-29",
        "value": "3018532.20",
        "weight": "0.00510680",
        "shared": false
      },
      {
        "name": "WASTE MANAGEMENT INC (MPT) 3.45% 11-01-44",
        "value": "3000298.80",
        "weight": "0.00507595",
        "shared": false
      },
      {
        "name": "NEW YORK NY REGD V/R B/E 2.65000000",
        "value": "3000000.00",
        "weight": "0.00507544",
        "shared": false
      },
      {
        "name": "NORTH CAROLINA ST HSG FIN AGYM REGD V/R B/E 5.00000000",
        "value": "2906436.68",
        "weight": "0.00491715",
        "shared": false
      },
      {
        "name": "TX TMGUTL 01/01/2054",
        "value": "2845828.47",
        "weight": "0.00481461",
        "shared": true
      },
      {
        "name": "FARM N MEX PCR 0% 6/1/2040 MT",
        "value": "2815916.35",
        "weight": "0.00476401",
        "shared": false
      },
      {
        "name": "Public Energy Authority of Kentucky, Gas Supply Revenue Bonds, Refunding Series 2024B",
        "value": "2731069.46",
        "weight": "0.00462046",
        "shared": false
      },
      {
        "name": "DFW ARPT 5% 11/1/2031 @",
        "value": "2725976.00",
        "weight": "0.00461185",
        "shared": false
      },
      {
        "name": "FLORIDA DEV FIN CORP HLTHCAREFACS REVENUE",
        "value": "2707992.75",
        "weight": "0.00458142",
        "shared": false
      },
      {
        "name": "City of Atlanta GA Department of Aviation",
        "value": "2697235.25",
        "weight": "0.00456322",
        "shared": false
      },
      {
        "name": "TN TNSUTL 05/01/2053",
        "value": "2573669.50",
        "weight": "0.00435417",
        "shared": false
      },
      {
        "name": "City of Philadelphia PA Airport Revenue",
        "value": "2566634.16",
        "weight": "0.00434227",
        "shared": false
      },
      {
        "name": "FAIRFAX C VA 5% 1/1/2045 MT",
        "value": "2555159.50",
        "weight": "0.00432286",
        "shared": true
      },
      {
        "name": "WASTE MANAGEMENT INC (MPT) 3.45% 10-01-41",
        "value": "2515175.25",
        "weight": "0.00425521",
        "shared": false
      },
      {
        "name": "NORTH BLOCK ASSOCIATES LLC HUD SECT 8 FHA 221(D)(4) (MPT) 3.4% 02-01-29",
        "value": "2511564.25",
        "weight": "0.00424910",
        "shared": false
      },
      {
        "name": "COUNTY OF TRIMBLE KY TRMENV 06/33 FIXED 3.75",
        "value": "2502465.75",
        "weight": "0.00423371",
        "shared": false
      },
      {
        "name": "ARKANSAS DEV FIN AUTH ENVIRONM REGD V/R B/E AMT 4.00000000",
        "value": "2495967.00",
        "weight": "0.00422271",
        "shared": false
      },
      {
        "name": "MOBILE PCR-VAR-AL PWR",
        "value": "2478086.00",
        "weight": "0.00419246",
        "shared": false
      },
      {
        "name": "MTRO WA DC ARPT 5% 10/1/2031 @",
        "value": "2455847.33",
        "weight": "0.00415484",
        "shared": false
      },
      {
        "name": "LEHIGH PA_IDA 3% 9/1/2029",
        "value": "2450784.00",
        "weight": "0.00414627",
        "shared": false
      },
      {
        "name": "INDIANAPOLIS IN LOCAL PUBLIC I REGD N/C B/E AMT 5.00000000",
        "value": "2438325.30",
        "weight": "0.00412519",
        "shared": false
      },
      {
        "name": "State of Illinois, Series C",
        "value": "2437731.08",
        "weight": "0.00412419",
        "shared": false
      },
      {
        "name": "NORTHWESTERN CORP 3.875% 07-01-28",
        "value": "2431955.57",
        "weight": "0.00411442",
        "shared": false
      },
      {
        "name": "HOUSTON-UTL SYS-B-REF",
        "value": "2424190.04",
        "weight": "0.00410128",
        "shared": false
      },
      {
        "name": "DE ST EDA 3.60% 1/1/31",
        "value": "2419505.95",
        "weight": "0.00409335",
        "shared": false
      },
      {
        "name": "PEFA INC VAR",
        "value": "2408907.05",
        "weight": "0.00407542",
        "shared": true
      },
      {
        "name": "TENNERGY CORP TN GAS REVENUE TENNERGY CORP/TN",
        "value": "2384879.46",
        "weight": "0.00403477",
        "shared": false
      },
      {
        "name": "NY TRANS CORP 5% 1/1/2032 @",
        "value": "2370014.59",
        "weight": "0.00400962",
        "shared": false
      },
      {
        "name": "SOUTHEAST ENERGY-F",
        "value": "2355034.34",
        "weight": "0.00398428",
        "shared": false
      },
      {
        "name": "SOUTHEAST ENERGY AUTH VAR",
        "value": "2342301.03",
        "weight": "0.00396274",
        "shared": false
      },
      {
        "name": "South Carolina Jobs-Economic Development Authority, Series 2023A",
        "value": "2313365.26",
        "weight": "0.00391378",
        "shared": false
      },
      {
        "name": "MTRO WA DC ARPT 5% 10/1/2035 @",
        "value": "2304524.08",
        "weight": "0.00389883",
        "shared": false
      },
      {
        "name": "NYC HSG DEV CORP-F-2A",
        "value": "2260772.92",
        "weight": "0.00382481",
        "shared": false
      }
    ],
    "b_top": [
      {
        "name": "San Francisco City & County Airport Comm-San Francisco International Airport",
        "value": "5258672.50",
        "weight": "0.01750954",
        "shared": false
      },
      {
        "name": "PORT NY NJ 5% 9/15/2029@",
        "value": "5196001.00",
        "weight": "0.01730086",
        "shared": false
      },
      {
        "name": "OKLAHOMA ST INDUSTRIES AUTH ED REGD N/C B/E 5.00000000",
        "value": "4555975.60",
        "weight": "0.01516980",
        "shared": false
      },
      {
        "name": "NJ STUD LOAN 5% 12/1/2028 @",
        "value": "4216735.60",
        "weight": "0.01404025",
        "shared": false
      },
      {
        "name": "NEW YORK NY REGD N/C B/E 5.00000000",
        "value": "4161268.00",
        "weight": "0.01385556",
        "shared": false
      },
      {
        "name": "State of Illinois",
        "value": "3939652.85",
        "weight": "0.01311766",
        "shared": false
      },
      {
        "name": "HOUSTON TX ARPT SYS REVENUE",
        "value": "3589582.10",
        "weight": "0.01195205",
        "shared": true
      },
      {
        "name": "NEW YORK ST DORM AUTH ST PERSONAL INCOME TAX REVENUE",
        "value": "3510304.85",
        "weight": "0.01168808",
        "shared": false
      },
      {
        "name": "GEISINGER PA AUTH HLTH SYS REV GEISINGER AUTHORITY",
        "value": "3394449.48",
        "weight": "0.01130233",
        "shared": false
      },
      {
        "name": "LOS ANGELES UNIF SD-A",
        "value": "3311622.30",
        "weight": "0.01102654",
        "shared": false
      },
      {
        "name": "LONG ISLAND PWR-F-REF",
        "value": "3290029.20",
        "weight": "0.01095464",
        "shared": false
      },
      {
        "name": "SOUTHEAST ENERGY-E",
        "value": "3257120.10",
        "weight": "0.01084507",
        "shared": false
      },
      {
        "name": "Los Angeles (City of), CA, Series 2025, RN",
        "value": "3236671.68",
        "weight": "0.01077698",
        "shared": true
      },
      {
        "name": "WASHINGTON ST HLTH CARE FACS AUTH",
        "value": "3234021.90",
        "weight": "0.01076816",
        "shared": false
      },
      {
        "name": "PORT NY NJ 5% 9/1/2028 @",
        "value": "3175604.10",
        "weight": "0.01057365",
        "shared": false
      },
      {
        "name": "NJ TPK AUTH-B",
        "value": "3050655.98",
        "weight": "0.01015761",
        "shared": false
      },
      {
        "name": "INDIANA ST FIN AUTH ENVRNMNTL REVENUE",
        "value": "3041305.80",
        "weight": "0.01012648",
        "shared": false
      },
      {
        "name": "MANOR HSG PUBLIC FAC CORP TX M MNRMFH 11/42 ADJUSTABLE VAR",
        "value": "3030525.60",
        "weight": "0.01009059",
        "shared": false
      },
      {
        "name": "PIONEER VLY TRANSIT",
        "value": "3016359.00",
        "weight": "0.01004342",
        "shared": false
      },
      {
        "name": "PEFA INC VAR",
        "value": "2903991.42",
        "weight": "0.00966927",
        "shared": true
      },
      {
        "name": "NEW YORK NY",
        "value": "2850000.00",
        "weight": "0.00948950",
        "shared": false
      },
      {
        "name": "FAIRFAX C VA 5% 1/1/2045 MT",
        "value": "2833301.90",
        "weight": "0.00943390",
        "shared": true
      },
      {
        "name": "UNIV OF TEXAS TX UNIV REVENUES",
        "value": "2670939.25",
        "weight": "0.00889329",
        "shared": false
      },
      {
        "name": "DENVER CITY & CNTY CO ARPT REVENUE",
        "value": "2660407.25",
        "weight": "0.00885822",
        "shared": false
      },
      {
        "name": "BLKR-LI MUNI-INS",
        "value": "2627786.97",
        "weight": "0.00874961",
        "shared": false
      },
      {
        "name": "TX MATPOL 4.25 05/01/2030",
        "value": "2619659.50",
        "weight": "0.00872255",
        "shared": true
      },
      {
        "name": "New York (City of), NY, Series 2023, A GO Bonds",
        "value": "2558608.63",
        "weight": "0.00851927",
        "shared": false
      },
      {
        "name": "Public Energy Authority of Kentucky, Gas Supply Revenue Bonds, Refunding Series 2025A",
        "value": "2553750.24",
        "weight": "0.00850309",
        "shared": true
      },
      {
        "name": "CHANDLER INDUSTRIAL D VAR",
        "value": "2550863.50",
        "weight": "0.00849348",
        "shared": false
      },
      {
        "name": "OH OHSDEV 11/01/2039",
        "value": "2539967.00",
        "weight": "0.00845720",
        "shared": true
      },
      {
        "name": "WISCONSIN ST HLTH & EDUCTNL FA WISCONSIN HEALTH & EDUCATIONAL FACILITIES AUTHORIT",
        "value": "2519651.50",
        "weight": "0.00838956",
        "shared": false
      },
      {
        "name": "MI ST HSG DEV AUTH-A",
        "value": "2501372.00",
        "weight": "0.00832869",
        "shared": false
      },
      {
        "name": "MI ST HSG DEV AUTH-A",
        "value": "2500231.50",
        "weight": "0.00832489",
        "shared": false
      },
      {
        "name": "LONG ISLAND PWR-B",
        "value": "2498650.25",
        "weight": "0.00831963",
        "shared": false
      },
      {
        "name": "WM S HART UHSD-B-CABS",
        "value": "2463294.00",
        "weight": "0.00820191",
        "shared": false
      },
      {
        "name": "MICHIGAN STATE FINANCE AUTHORITY",
        "value": "2462533.81",
        "weight": "0.00819937",
        "shared": false
      },
      {
        "name": "Great Lakes Water Authority Water Supply System, Series 2024A",
        "value": "2448094.73",
        "weight": "0.00815130",
        "shared": false
      },
      {
        "name": "BERGEN N Y",
        "value": "2413426.32",
        "weight": "0.00803586",
        "shared": false
      },
      {
        "name": "NH NHSMED 5 06/01/2035",
        "value": "2388146.80",
        "weight": "0.00795169",
        "shared": false
      },
      {
        "name": "KANSAS CITY MO INDL DEV AUTH",
        "value": "2303633.18",
        "weight": "0.00767029",
        "shared": false
      },
      {
        "name": "WASHINGTON (STATE OF)",
        "value": "2242981.95",
        "weight": "0.00746834",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST SCH BLDG AUTH SALES TAX REVENUE",
        "value": "2222159.60",
        "weight": "0.00739901",
        "shared": false
      },
      {
        "name": "CALIFORNIA COMMUNITY VAR",
        "value": "2193805.20",
        "weight": "0.00730460",
        "shared": false
      },
      {
        "name": "PHILADELPHIA PA HSG AUTH",
        "value": "2169099.80",
        "weight": "0.00722234",
        "shared": false
      },
      {
        "name": "Pennsylvania Higher Education Assistance Agency, Series 2025-1A",
        "value": "2166480.00",
        "weight": "0.00721362",
        "shared": false
      },
      {
        "name": "UNITED AIRLINES INC 5.25% 07-15-33",
        "value": "2165831.60",
        "weight": "0.00721146",
        "shared": true
      },
      {
        "name": "DUVAL FL SD COP 5% 7/1/2026",
        "value": "2148254.94",
        "weight": "0.00715294",
        "shared": false
      },
      {
        "name": "SOUTHEAST ENERGY AUTH VAR",
        "value": "2138476.80",
        "weight": "0.00712038",
        "shared": false
      },
      {
        "name": "NJ HLTH CARE FACS FIN",
        "value": "2104596.40",
        "weight": "0.00700757",
        "shared": false
      },
      {
        "name": "MAIN STR NAT GA 5% 12/1/2052 MT",
        "value": "2096794.60",
        "weight": "0.00698159",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000940400-26-025147",
      "as_of": "2026-04-30",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1424212/000094040026025147/0000940400-26-025147-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001410368-26-033301",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1097519/000141036826033301/0001410368-26-033301-index.htm"
    }
  ]
}