{
  "page": "compare",
  "query": {
    "a": "MBND",
    "b": "MFSM"
  },
  "retrieved_at": "2026-07-07T14:09:06+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": "State Street(R) Nuveen Municipal Bond ETF",
    "ticker": "MBND",
    "slug": "MBND",
    "series_id": "S000070917",
    "html_url": "https://fundwatcher.app/funds/MBND/"
  },
  "fund_b": {
    "name": "MFS Active Intermediate Muni Bond ETF",
    "ticker": "MFSM",
    "slug": "MFSM",
    "series_id": "S000085668",
    "html_url": "https://fundwatcher.app/funds/MFSM/"
  },
  "overlap": {
    "coverage_a_by_b": "0.02979927801011638398402150462",
    "coverage_b_by_a": "0.02979927801011638398402150462",
    "shared_count": 3,
    "as_of": {
      "a": "2026-03-31",
      "b": "2026-02-28"
    },
    "a_top": [
      {
        "name": "ARIZONA BRD OF RGTS",
        "value": "794755.08",
        "weight": "0.02919099",
        "shared": false
      },
      {
        "name": "UT TELECOM OPEN INFR",
        "value": "768058.73",
        "weight": "0.02821045",
        "shared": false
      },
      {
        "name": "NEW YORK CITY NY INDL DEV AGY REVENUE",
        "value": "749586.66",
        "weight": "0.02753198",
        "shared": false
      },
      {
        "name": "NEW MEXICO ST HOSP EQUIPMENT LOAN COUNCIL HOSP REVENUE",
        "value": "747080.72",
        "weight": "0.02743993",
        "shared": false
      },
      {
        "name": "SAN FRANCISCO CA BAY AREA RAPID TRANSIT DIST",
        "value": "708542.28",
        "weight": "0.02602444",
        "shared": false
      },
      {
        "name": "Southeast Energy Authority, Alabama, A Cooperative District Energy Supply Revenue Bonds Series 2024A",
        "value": "663906.82",
        "weight": "0.02438500",
        "shared": true
      },
      {
        "name": "TRIBOROUGH NY BRIDGE   TUNNEL TRBGEN 12/34 FIXED 5",
        "value": "662950.97",
        "weight": "0.02434989",
        "shared": false
      },
      {
        "name": "CALIFORNIA CMNTY CHOICE FING AUTH CLEAN ENERGY PROJ REVENUE",
        "value": "635122.38",
        "weight": "0.02332776",
        "shared": false
      },
      {
        "name": "MAIN STR NAT GA 5% MT",
        "value": "635090.40",
        "weight": "0.02332658",
        "shared": false
      },
      {
        "name": "FT BEND TX ISD 4% 2/15/2033",
        "value": "619591.15",
        "weight": "0.02275730",
        "shared": false
      },
      {
        "name": "State Street Navigator Securities Lending Portfolio II",
        "value": "608429.98",
        "weight": "0.02234736",
        "shared": true
      },
      {
        "name": "POWERSOUTH ENERGY COOPERATIVE 5.0% 01-01-48",
        "value": "600950.80",
        "weight": "0.02207265",
        "shared": false
      },
      {
        "name": "OK TPK AUTH-A",
        "value": "586405.93",
        "weight": "0.02153842",
        "shared": false
      },
      {
        "name": "State of Ohio",
        "value": "561126.51",
        "weight": "0.02060992",
        "shared": false
      },
      {
        "name": "MICHIGAN ST UNIV REVENUES",
        "value": "543361.10",
        "weight": "0.01995741",
        "shared": false
      },
      {
        "name": "Trails at Crowfoot Metropolitan District No 3 5.00% 12/01/2039",
        "value": "534176.00",
        "weight": "0.01962004",
        "shared": false
      },
      {
        "name": "NJ TPK AUTH-B",
        "value": "531685.80",
        "weight": "0.01952858",
        "shared": false
      },
      {
        "name": "UNITED STATES STEEL CORP 5.45% 09-01-52",
        "value": "529022.76",
        "weight": "0.01943077",
        "shared": false
      },
      {
        "name": "California Community Choice Financing Authority, Series 2023 E-1",
        "value": "528102.95",
        "weight": "0.01939698",
        "shared": false
      },
      {
        "name": "UNIV OF TEXAS TX UNIV REVENUES",
        "value": "516656.75",
        "weight": "0.01897657",
        "shared": false
      },
      {
        "name": "TX PRIVATE ACTIVITY",
        "value": "508381.00",
        "weight": "0.01867260",
        "shared": false
      },
      {
        "name": "MUNIBOND",
        "value": "502996.90",
        "weight": "0.01847485",
        "shared": false
      },
      {
        "name": "OKLAHOMA CNTY OK FIN AUTH EDUCTNL FACS LEASE REVENUE",
        "value": "495463.05",
        "weight": "0.01819813",
        "shared": false
      },
      {
        "name": "Maricopa County Pollution Control Corp., Series 2010 B",
        "value": "494484.45",
        "weight": "0.01816219",
        "shared": false
      },
      {
        "name": "MIAMI-DADE COUNTY-REV",
        "value": "490291.71",
        "weight": "0.01800819",
        "shared": false
      },
      {
        "name": "KENTUCKY ST ECON DEV FIN AUTH REGD OID B/E 4.25000000",
        "value": "450115.52",
        "weight": "0.01653254",
        "shared": false
      },
      {
        "name": "NEW HOPE EDU FACS-A-1",
        "value": "420997.10",
        "weight": "0.01546303",
        "shared": false
      },
      {
        "name": "TRIBOROUGH NY BRIDGE   TUNNEL TRBGEN 12/33 FIXED 5",
        "value": "412320.31",
        "weight": "0.01514434",
        "shared": false
      },
      {
        "name": "DULUTH MN ECON DEV AUTH HLTH CARE FACS REVENUE",
        "value": "385326.84",
        "weight": "0.01415288",
        "shared": false
      },
      {
        "name": "WISCONSIN ST HLTH & EDUCTNL FACS AUTH REVENUE",
        "value": "377790.53",
        "weight": "0.01387607",
        "shared": false
      },
      {
        "name": "San Francisco (City & County of), CA Special Tax District No. 2020-1, Series 2023, RB",
        "value": "361843.41",
        "weight": "0.01329034",
        "shared": false
      },
      {
        "name": "RIVERSIDE HEALTHCARE ASSOCIATION OBLIGATED GROUP AG 5.25% 07-01-48",
        "value": "360100.51",
        "weight": "0.01322633",
        "shared": false
      },
      {
        "name": "RICHMOND CNTY GA HOSP AUTH REVENUE ANTICIPATION CTFS",
        "value": "339973.07",
        "weight": "0.01248706",
        "shared": false
      },
      {
        "name": "NTHRN IL UNIV -B",
        "value": "339919.43",
        "weight": "0.01248509",
        "shared": false
      },
      {
        "name": "Louisiana Public Facilities Authority",
        "value": "311176.48",
        "weight": "0.01142937",
        "shared": false
      },
      {
        "name": "OKLAHOMA ST DEV FIN AUTH HLTHSYS REVENUE",
        "value": "302627.07",
        "weight": "0.01111535",
        "shared": false
      },
      {
        "name": "WASTE PRO USA INC (MPT) 6.125% 07-01-32",
        "value": "300193.41",
        "weight": "0.01102597",
        "shared": false
      },
      {
        "name": "FLORIDA ST DEV FIN CORP SOL WS REGD N/C B/E AMT 4.50000000",
        "value": "298609.68",
        "weight": "0.01096780",
        "shared": false
      },
      {
        "name": "MWAA DULLES TOL 4% 10/1/2038",
        "value": "295740.93",
        "weight": "0.01086243",
        "shared": false
      },
      {
        "name": "OLATHE KS",
        "value": "295333.56",
        "weight": "0.01084747",
        "shared": false
      },
      {
        "name": "CTR PLN ENG GAS 5% MT",
        "value": "290859.88",
        "weight": "0.01068315",
        "shared": false
      },
      {
        "name": "Preserve at South Branch Community Development District",
        "value": "286250.70",
        "weight": "0.01051386",
        "shared": false
      },
      {
        "name": "TN ENERGY",
        "value": "277128.97",
        "weight": "0.01017882",
        "shared": false
      },
      {
        "name": "NY TRANSPRTN DEV -AMT",
        "value": "274125.00",
        "weight": "0.01006849",
        "shared": true
      },
      {
        "name": "State of California, Series 2025, GO Bonds",
        "value": "271989.38",
        "weight": "0.00999005",
        "shared": false
      },
      {
        "name": "SAN ANTONIO TX",
        "value": "270243.68",
        "weight": "0.00992593",
        "shared": false
      },
      {
        "name": "UTAH ST ASSOCIATED MUNI PWR SYS REVENUE",
        "value": "269335.69",
        "weight": "0.00989258",
        "shared": false
      },
      {
        "name": "FLORIDA ST DEV FIN CORP REGD V/R B/E AMT 10.00000000",
        "value": "269100.00",
        "weight": "0.00988392",
        "shared": false
      },
      {
        "name": "Chicago O'Hare International Airport",
        "value": "268463.25",
        "weight": "0.00986053",
        "shared": false
      },
      {
        "name": "Orange County Community Facilities District 5.00% 08/15/2037",
        "value": "262148.13",
        "weight": "0.00962858",
        "shared": false
      }
    ],
    "b_top": [
      {
        "name": "State Street Navigator Securities Lending Portfolio II",
        "value": "3348853.41",
        "weight": "0.04555132",
        "shared": true
      },
      {
        "name": "ISHARES NATIONAL MUNI BOND ETF ISHARES NATIONAL MUNI BOND E",
        "value": "2946286.00",
        "weight": "0.04007557",
        "shared": false
      },
      {
        "name": "VANGUARD TAX-EXM",
        "value": "2946240.00",
        "weight": "0.04007494",
        "shared": false
      },
      {
        "name": "PASCO CNTY FL SOL WST DISP & RESOURCE RECOVERY SYS",
        "value": "751057.98",
        "weight": "0.01021594",
        "shared": false
      },
      {
        "name": "Kentucky Bond Development Corp., Series A",
        "value": "575936.10",
        "weight": "0.00783392",
        "shared": false
      },
      {
        "name": "CHERRY CREEK SD#5",
        "value": "575706.85",
        "weight": "0.00783080",
        "shared": false
      },
      {
        "name": "GTR ASHEVILLE REGL ARPT AUTH N REGD B/E AMT AG 5.25000000",
        "value": "549841.00",
        "weight": "0.00747897",
        "shared": false
      },
      {
        "name": "California Community Choice Financing Authority, Series F",
        "value": "548866.50",
        "weight": "0.00746572",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA ST TURNPIKE COMMISSION TURNPIKE REVENUE",
        "value": "548835.85",
        "weight": "0.00746530",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING REGD B/E AMT AG 5.50000000",
        "value": "545506.40",
        "weight": "0.00742001",
        "shared": false
      },
      {
        "name": "State of Minnesota 4.00% 08/01/2041",
        "value": "519783.60",
        "weight": "0.00707013",
        "shared": false
      },
      {
        "name": "NORTH ALLEGHENY PA SC",
        "value": "517393.05",
        "weight": "0.00703761",
        "shared": false
      },
      {
        "name": "NYC HSG DEV CORP-F-2",
        "value": "505958.35",
        "weight": "0.00688208",
        "shared": false
      },
      {
        "name": "SANTA NM 3.29% 12/10/2049 MT",
        "value": "504510.30",
        "weight": "0.00686238",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING REGD B/E AMT 5.00000000",
        "value": "502491.85",
        "weight": "0.00683493",
        "shared": false
      },
      {
        "name": "CALIFORNIA COMMUNITY VAR",
        "value": "488218.46",
        "weight": "0.00664078",
        "shared": false
      },
      {
        "name": "BLACK BELT ENERGY GAS DIST AL GAS PROJECT REVENUE",
        "value": "469192.35",
        "weight": "0.00638198",
        "shared": false
      },
      {
        "name": "Fulton (County of), GA Development Authority (Georgia Institute of Technology), Series 2019, RB",
        "value": "447686.46",
        "weight": "0.00608946",
        "shared": false
      },
      {
        "name": "HOUSTON TX ARPT SYS REVENUE REGD B/E AMT 5.25000000",
        "value": "444149.82",
        "weight": "0.00604135",
        "shared": false
      },
      {
        "name": "Public Energy Authority of Kentucky, Gas Supply Revenue Bonds, Series 2025B",
        "value": "394264.45",
        "weight": "0.00536281",
        "shared": false
      },
      {
        "name": "PROVIDENCE RI PUBLIC BLDGS AUTH REVENUE",
        "value": "385263.04",
        "weight": "0.00524037",
        "shared": false
      },
      {
        "name": "ROCKLAND CNTY NY SOL WST MGMT AUTH",
        "value": "381496.80",
        "weight": "0.00518914",
        "shared": false
      },
      {
        "name": "MAIN STR NAT GA 5% MT",
        "value": "378781.37",
        "weight": "0.00515221",
        "shared": false
      },
      {
        "name": "Los Angeles (City of), CA Department of Airports (Los Angeles International Airport), Series 2018 A, RB",
        "value": "365360.94",
        "weight": "0.00496966",
        "shared": false
      },
      {
        "name": "N ORLEANS AVIAT 5% 1/1/2036@",
        "value": "360164.97",
        "weight": "0.00489899",
        "shared": false
      },
      {
        "name": "METROHEALTH SYSTEM 5.5% 02-15-52",
        "value": "346519.60",
        "weight": "0.00471338",
        "shared": false
      },
      {
        "name": "COOK CNTY IL CMNTY SCH DIST #152 1/2 HAZEL CREST",
        "value": "344323.26",
        "weight": "0.00468351",
        "shared": false
      },
      {
        "name": "Omaha Airport Authority",
        "value": "337127.43",
        "weight": "0.00458563",
        "shared": false
      },
      {
        "name": "PUBLIC FIN AUTH WI REVENUE",
        "value": "337075.52",
        "weight": "0.00458492",
        "shared": false
      },
      {
        "name": "STHRN ILLINOIS ST UNIV",
        "value": "333782.21",
        "weight": "0.00454013",
        "shared": false
      },
      {
        "name": "CENTRL TX REGL MOBILITY AUTH REVENUE",
        "value": "333300.19",
        "weight": "0.00453357",
        "shared": false
      },
      {
        "name": "PUERTO RICO ELEC PWR AUTH PWRREVENUE",
        "value": "332263.43",
        "weight": "0.00451947",
        "shared": false
      },
      {
        "name": "Miami County Unified School District No 367 Osawatomie     5.250%  09/01/2042",
        "value": "328437.87",
        "weight": "0.00446743",
        "shared": false
      },
      {
        "name": "CHESAPEAKE VA HOSP AUTH HOSP FAC REVENUE",
        "value": "325167.81",
        "weight": "0.00442295",
        "shared": false
      },
      {
        "name": "PK CREEK MET DIST-REF",
        "value": "321069.87",
        "weight": "0.00436721",
        "shared": false
      },
      {
        "name": "LAWTON OK INDL DEV AUTH SALES TAX REVENUE",
        "value": "320865.30",
        "weight": "0.00436443",
        "shared": false
      },
      {
        "name": "RAMPART RANGE CO MET DIST #1 LIMITED TAX SUPPORTED & SPL REV",
        "value": "317772.51",
        "weight": "0.00432236",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST EDUCTNL FING AUTH",
        "value": "317098.02",
        "weight": "0.00431319",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING PASMED 03/60 ADJUSTABLE VAR",
        "value": "310811.90",
        "weight": "0.00422768",
        "shared": false
      },
      {
        "name": "GRAND PKWY TRANSPRTN",
        "value": "310065.69",
        "weight": "0.00421753",
        "shared": false
      },
      {
        "name": "RESTRUCTURED-SER A1",
        "value": "306984.12",
        "weight": "0.00417562",
        "shared": false
      },
      {
        "name": "MAINE HLTH & HGR EDUCTNL FACS AUTH REVENUE",
        "value": "302355.96",
        "weight": "0.00411266",
        "shared": false
      },
      {
        "name": "COMMERCE SCHOOL DISTRICT",
        "value": "300067.83",
        "weight": "0.00408154",
        "shared": false
      },
      {
        "name": "UT SALAPT 5 07/01/2042",
        "value": "299715.49",
        "weight": "0.00407675",
        "shared": false
      },
      {
        "name": "METROCARE SERVICES TX REVENUE",
        "value": "296998.54",
        "weight": "0.00403979",
        "shared": false
      },
      {
        "name": "GRAND RIVER CO HOSP DIST",
        "value": "294956.28",
        "weight": "0.00401201",
        "shared": false
      },
      {
        "name": "New York Transportation Development Corp., Series 2025",
        "value": "289840.85",
        "weight": "0.00394243",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST JOBS-ECON DEV AUTH HLTH FACS REVENUE",
        "value": "286176.85",
        "weight": "0.00389260",
        "shared": false
      },
      {
        "name": "WYOMING MI PUBLIC SCHS",
        "value": "283499.98",
        "weight": "0.00385618",
        "shared": false
      },
      {
        "name": "MASSACHUSET REV 5% 7/1/2041",
        "value": "282728.95",
        "weight": "0.00384570",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001410368-26-055552",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1516212/000141036826055552/0001410368-26-055552-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001410368-26-040051",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/2018846/000141036826040051/0001410368-26-040051-index.htm"
    }
  ]
}