{
  "page": "compare",
  "query": {
    "a": "AMABX",
    "b": "ATTYX"
  },
  "retrieved_at": "2026-07-07T17:39:15+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": "AB Massachusetts Portfolio",
    "ticker": "AMABX",
    "slug": "AMABX",
    "series_id": "S000010355",
    "html_url": "https://fundwatcher.app/funds/AMABX/"
  },
  "fund_b": {
    "name": "AB Tax-Aware Fixed Income Opportunities Portfolio",
    "ticker": "ATTYX",
    "slug": "ATTYX",
    "series_id": "S000043269",
    "html_url": "https://fundwatcher.app/funds/ATTYX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.04492661524052929799575530298",
    "coverage_b_by_a": "0.04492661524052929799575530297",
    "shared_count": 31,
    "as_of": {
      "a": "2026-02-28",
      "b": "2026-01-31"
    },
    "a_top": [
      {
        "name": "QUINCY MA",
        "value": "7329477.65",
        "weight": "0.02826054",
        "shared": true
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "7154974.97",
        "weight": "0.02758770",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "5607897.34",
        "weight": "0.02162258",
        "shared": false
      },
      {
        "name": "Massachusetts Water Resources Authority",
        "value": "5567857.90",
        "weight": "0.02146820",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST MAS 12/54 FIXED 5",
        "value": "5246557.00",
        "weight": "0.02022934",
        "shared": true
      },
      {
        "name": "MASSACHUSETTS ST",
        "value": "5173718.50",
        "weight": "0.01994850",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST PORT AUTH REGD B/E AMT 5.00000000",
        "value": "5066577.50",
        "weight": "0.01953539",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST PORT AUTH",
        "value": "5020833.45",
        "weight": "0.01935901",
        "shared": false
      },
      {
        "name": "MA ST DEV FIN AGY",
        "value": "4318442.40",
        "weight": "0.01665078",
        "shared": false
      },
      {
        "name": "MBTA SLS TAX 5.25% 7/1/2053",
        "value": "4251004.40",
        "weight": "0.01639076",
        "shared": false
      },
      {
        "name": "MA ST",
        "value": "4248466.80",
        "weight": "0.01638097",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST PORT AUTH",
        "value": "4237713.60",
        "weight": "0.01633951",
        "shared": false
      },
      {
        "name": "MBTA SLS TAX 5.25% 7/1/55",
        "value": "3758543.25",
        "weight": "0.01449195",
        "shared": true
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY R REGD B/E 5.00000000",
        "value": "3756941.71",
        "weight": "0.01448578",
        "shared": false
      },
      {
        "name": "MASS DEVEL FIN 5% 7/1/2050",
        "value": "3558042.53",
        "weight": "0.01371888",
        "shared": false
      },
      {
        "name": "QUINCY MA",
        "value": "3502745.59",
        "weight": "0.01350567",
        "shared": false
      },
      {
        "name": "PRG MEDFORD PROPERTIES INC 5.25% 06-01-55",
        "value": "3401821.15",
        "weight": "0.01311653",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "3323480.65",
        "weight": "0.01281447",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "3300276.60",
        "weight": "0.01272500",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "3149945.60",
        "weight": "0.01214536",
        "shared": false
      },
      {
        "name": "MASS CMNWLTH-B",
        "value": "3138277.50",
        "weight": "0.01210037",
        "shared": false
      },
      {
        "name": "MA ST TRANS REV 5% 6/1/52",
        "value": "3115159.20",
        "weight": "0.01201123",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST BAY TRANSPRTN MASTRN 07/50 FIXED 5",
        "value": "3053340.30",
        "weight": "0.01177288",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "3053237.40",
        "weight": "0.01177248",
        "shared": false
      },
      {
        "name": "MASS DEVEL FIN 5% 7/1/2053",
        "value": "3020805.90",
        "weight": "0.01164743",
        "shared": false
      },
      {
        "name": "U.S. Treasury Bills",
        "value": "2986427.64",
        "weight": "0.01151488",
        "shared": false
      },
      {
        "name": "SUFFOLK UNIVERSITY 5.25% 07-01-55",
        "value": "2985330.30",
        "weight": "0.01151065",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST PORT AUTH",
        "value": "2630395.00",
        "weight": "0.01014211",
        "shared": false
      },
      {
        "name": "UNIV OF MASSACHUSETTS MA BLDG AUTH REVENUE",
        "value": "2600748.00",
        "weight": "0.01002780",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "2502547.25",
        "weight": "0.00964916",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST",
        "value": "2453085.63",
        "weight": "0.00945845",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "2325443.54",
        "weight": "0.00896630",
        "shared": false
      },
      {
        "name": "MA ST DEV FIN AGY-M",
        "value": "2315681.40",
        "weight": "0.00892866",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "2267176.50",
        "weight": "0.00874164",
        "shared": false
      },
      {
        "name": "Territory of Guam, Series F",
        "value": "2242394.55",
        "weight": "0.00864608",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST",
        "value": "2181310.00",
        "weight": "0.00841056",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY R MASDEV 07/54 FIXED OID 5",
        "value": "2160222.24",
        "weight": "0.00832925",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST",
        "value": "2155022.40",
        "weight": "0.00830920",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST PORT AUTH SPL FACS REVENUE",
        "value": "2136257.40",
        "weight": "0.00823685",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "2122107.40",
        "weight": "0.00818229",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "2108237.46",
        "weight": "0.00812881",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST MAS 10/52 FIXED 5",
        "value": "2085703.26",
        "weight": "0.00804192",
        "shared": false
      },
      {
        "name": "WORCESTER MA",
        "value": "2075932.04",
        "weight": "0.00800425",
        "shared": false
      },
      {
        "name": "MA ST TRANS REV 5% 6/1/50",
        "value": "2075602.60",
        "weight": "0.00800298",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "2069881.84",
        "weight": "0.00798092",
        "shared": false
      },
      {
        "name": "MA ST DFA 5% 7/1/39",
        "value": "2058526.17",
        "weight": "0.00793714",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST BAY TRANSPRTN AUTH SALES TAX REVENUE",
        "value": "2056412.80",
        "weight": "0.00792899",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST HLTH & EDUCTNL FACS AUTH REVENUE",
        "value": "2054407.68",
        "weight": "0.00792126",
        "shared": false
      },
      {
        "name": "QUINCY MA",
        "value": "2030217.40",
        "weight": "0.00782798",
        "shared": true
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY R REGD B/E 5.00000000",
        "value": "2011219.80",
        "weight": "0.00775473",
        "shared": false
      }
    ],
    "b_top": [
      {
        "name": "AB Fixed Income Shares, Inc. - Government Money Market Portfolio",
        "value": "35927244.53",
        "weight": "0.02908969",
        "shared": true
      },
      {
        "name": "SOUTHEAST ENRG 5% MT",
        "value": "10595762.00",
        "weight": "0.00857921",
        "shared": false
      },
      {
        "name": "California Community Choice Financing Authority, Series B-1",
        "value": "10576049.00",
        "weight": "0.00856325",
        "shared": false
      },
      {
        "name": "COLUMBUS REGL ARPT-A",
        "value": "10574579.00",
        "weight": "0.00856206",
        "shared": false
      },
      {
        "name": "MTRO WA DC ARPT 5.5% 10/1/54@",
        "value": "10460039.00",
        "weight": "0.00846932",
        "shared": false
      },
      {
        "name": "Washington Metropolitan Area Transit Authority, Series 2023A",
        "value": "10422432.00",
        "weight": "0.00843887",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST MAS 12/54 FIXED 5",
        "value": "10342691.00",
        "weight": "0.00837431",
        "shared": true
      },
      {
        "name": "NEW YORK ST TWY -C",
        "value": "10114276.00",
        "weight": "0.00818936",
        "shared": false
      },
      {
        "name": "INDIANA ST FIN AUTH HLTH FAC REVENUE",
        "value": "9554533.24",
        "weight": "0.00773615",
        "shared": false
      },
      {
        "name": "Hillsborough County Industrial Development Authority",
        "value": "8550000.00",
        "weight": "0.00692279",
        "shared": false
      },
      {
        "name": "PORT SEATTLE 5% 10/1/2040@",
        "value": "7690118.80",
        "weight": "0.00622656",
        "shared": false
      },
      {
        "name": "BAY AREA TOLL-H",
        "value": "7500000.00",
        "weight": "0.00607263",
        "shared": false
      },
      {
        "name": "District of Columbia Income Tax Revenue (TOBs)",
        "value": "6825499.72",
        "weight": "0.00552649",
        "shared": false
      },
      {
        "name": "NY TRANSPRTN DEV CORP",
        "value": "6681910.65",
        "weight": "0.00541023",
        "shared": false
      },
      {
        "name": "LOS ANGELES CA WSTWTR SYS REVENUE",
        "value": "6542041.74",
        "weight": "0.00529698",
        "shared": false
      },
      {
        "name": "MET WASHINGTON DC ARPTS AUTH DULLES TOLL ROAD REVENUE",
        "value": "6356210.00",
        "weight": "0.00514652",
        "shared": false
      },
      {
        "name": "COLORADO ST EDUC LOAN PROGRAM",
        "value": "6217089.12",
        "weight": "0.00503387",
        "shared": false
      },
      {
        "name": "MIAMI-DADE CNTY FL AVIATION REVENUE",
        "value": "6195581.46",
        "weight": "0.00501646",
        "shared": false
      },
      {
        "name": "State of Colorado, Series B",
        "value": "6067489.20",
        "weight": "0.00491275",
        "shared": false
      },
      {
        "name": "PVT CLGS & UNIV AUTH-",
        "value": "5803955.00",
        "weight": "0.00469937",
        "shared": false
      },
      {
        "name": "Grand Traverse County Hospital Finance Authority, Series 2019 C",
        "value": "5800000.00",
        "weight": "0.00469616",
        "shared": false
      },
      {
        "name": "QUINCY MA",
        "value": "5691273.17",
        "weight": "0.00460813",
        "shared": true
      },
      {
        "name": "WI PUBTRN 5.75 12/31/2065",
        "value": "5635884.79",
        "weight": "0.00456328",
        "shared": false
      },
      {
        "name": "MBTA SLS TAX 5.25% 7/1/2048",
        "value": "5522824.76",
        "weight": "0.00447174",
        "shared": true
      },
      {
        "name": "SOUTHEAST ENERGY-E",
        "value": "5428533.50",
        "weight": "0.00439539",
        "shared": false
      },
      {
        "name": "District of Columbia (Green Bonds), Series 2022 A, RB",
        "value": "5337580.63",
        "weight": "0.00432175",
        "shared": false
      },
      {
        "name": "LOS ANGELES-D-REF-REV",
        "value": "5060426.08",
        "weight": "0.00409734",
        "shared": false
      },
      {
        "name": "MIAMI-DADE CNTY FL AVIATION REVENUE",
        "value": "5041995.06",
        "weight": "0.00408242",
        "shared": false
      },
      {
        "name": "UNITED AIRLINES INC 5.5% 07-15-38",
        "value": "5032630.36",
        "weight": "0.00407484",
        "shared": false
      },
      {
        "name": "COBB COUNTY SCHOOL DISTRICT",
        "value": "4821914.05",
        "weight": "0.00390422",
        "shared": false
      },
      {
        "name": "NY TRANS CORP 5% 6/30/2049 @",
        "value": "4797281.28",
        "weight": "0.00388428",
        "shared": false
      },
      {
        "name": "Puerto Rico, General Obligation Bonds, Vintage CW NT Claims Taxable Series 2022",
        "value": "4561091.40",
        "weight": "0.00369304",
        "shared": false
      },
      {
        "name": "State of Illinois, Series 2025B",
        "value": "4486240.80",
        "weight": "0.00363243",
        "shared": false
      },
      {
        "name": "NJ TRANSPRTN TRUST-A",
        "value": "4307831.25",
        "weight": "0.00348798",
        "shared": false
      },
      {
        "name": "TN TNSUTL 5 11/01/2034",
        "value": "4250010.08",
        "weight": "0.00344116",
        "shared": false
      },
      {
        "name": "FEDERAL HOME LOAN MTGE CORP MF VARIABLE RATE CTFS",
        "value": "4174927.87",
        "weight": "0.00338037",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA ST",
        "value": "4127398.80",
        "weight": "0.00334189",
        "shared": false
      },
      {
        "name": "WI PUBTRN 5.75 06/30/2060",
        "value": "4126895.49",
        "weight": "0.00334148",
        "shared": false
      },
      {
        "name": "Southeast Alabama Gas Supply District (The), Series A",
        "value": "4095733.71",
        "weight": "0.00331625",
        "shared": true
      },
      {
        "name": "ANCHORAGE MUNICIPLITY",
        "value": "4091193.60",
        "weight": "0.00331257",
        "shared": false
      },
      {
        "name": "BLACK BELT ENERGY GAS DISTRICT (MPT) 5.0% 03-01-55",
        "value": "4066204.14",
        "weight": "0.00329234",
        "shared": true
      },
      {
        "name": "DESERTXPRESS ENTERPRISES LLC (MPT) 3.5% 01-01-65",
        "value": "4001887.60",
        "weight": "0.00324026",
        "shared": false
      },
      {
        "name": "MET WASHINGTON DC ARPTS AUTH ARPT SYS REVENUE",
        "value": "3925418.43",
        "weight": "0.00317835",
        "shared": false
      },
      {
        "name": "NATIONAL FIN AUTH NH REVENUE",
        "value": "3868828.77",
        "weight": "0.00313253",
        "shared": false
      },
      {
        "name": "SAN FRANCISCO CITY & COUNTY AIRPORT COMM-SAN FRANCISCO INTERNATIONAL AIRPORT 5.25% 05-01-40",
        "value": "3794201.10",
        "weight": "0.00307210",
        "shared": false
      },
      {
        "name": "Metropolitan Nashville, TN Airport Auth. Rev. B, AMT",
        "value": "3660288.80",
        "weight": "0.00296368",
        "shared": false
      },
      {
        "name": "CALIFORNIA COMMUNITY VAR",
        "value": "3604346.02",
        "weight": "0.00291838",
        "shared": false
      },
      {
        "name": "Black Belt Energy Gas District, Series D-3",
        "value": "3579280.00",
        "weight": "0.00289808",
        "shared": false
      },
      {
        "name": "NJ TRANSPRTN TRUST-AA",
        "value": "3508015.16",
        "weight": "0.00284038",
        "shared": false
      },
      {
        "name": "ID HLTH FACS AUTH-C",
        "value": "3500000.00",
        "weight": "0.00283389",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001410368-26-040406",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/899774/000141036826040406/0001410368-26-040406-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001410368-26-032462",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/3794/000141036826032462/0001410368-26-032462-index.htm"
    }
  ]
}