{
  "page": "compare",
  "query": {
    "a": "OPYMX",
    "b": "LSMSX"
  },
  "retrieved_at": "2026-07-07T19:18:27+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": "Invesco Environmental Focus Municipal Fund",
    "ticker": "OPYMX",
    "slug": "OPYMX",
    "series_id": "S000064634",
    "html_url": "https://fundwatcher.app/funds/OPYMX/"
  },
  "fund_b": {
    "name": "Western Asset SMASh Series TF Fund",
    "ticker": "LSMSX",
    "slug": "LSMSX",
    "series_id": "S000052179",
    "html_url": "https://fundwatcher.app/funds/LSMSX/"
  },
  "overlap": {
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    "coverage_b_by_a": "0.02261586305801591321699669924",
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    "as_of": {
      "a": "2025-11-30",
      "b": "2026-02-27"
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      },
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      {
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        "name": "NY TRANS CORP(JFK INT NEW ONE)/AGM 5.25% 6/30/60@",
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      {
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      {
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        "name": "UNITED STATES STEEL CORP 5.45% 09-01-52",
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      {
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      {
        "name": "NEW YORK ST DORM AUTH REVENUES NON ST SUPPORTED DEBT",
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      {
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      {
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        "name": "City of Chicago, Series 2025A",
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        "name": "NJ ECON DEV AUTH-A",
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      {
        "name": "WASHINGTON ST HLTH CARE FACS AUTH",
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      {
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      {
        "name": "Chicago (City of), IL Park District, Series 2020 D, GO Bonds",
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      {
        "name": "PRATT PAPER KY LLC 4.45% 01-01-42",
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      {
        "name": "MASSACHUSETTS ST DEV FIN AGY R REGD B/E 5.00000000",
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        "weight": "0.01201167",
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      {
        "name": "Washington Metropolitan Area Transit Authority, Series 2024 A",
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      {
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        "weight": "0.01129121",
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      {
        "name": "COMMONSPIRIT HEALTH OBLIGATED GROUP 4.0% 04-01-49",
        "value": "883202.93",
        "weight": "0.01074575",
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      },
      {
        "name": "SOUTHERN CALIFORNIA EDISON CO 2.4% 06-01-35",
        "value": "853880.60",
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    ],
    "b_top": [
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      {
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      {
        "name": "ILLINOIS ST FIN AUTH REVENUE",
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      {
        "name": "CALIFORNIA COMMUNITY VAR",
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      {
        "name": "MET NASHVILLE TN ARPT AUTH ARPT REVENUE",
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      {
        "name": "Energy Southeast A Cooperative District, Series B-1",
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        "name": "CTR PLN ENG GAS 5% 9/1/2033",
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        "name": "CTR TX RMA 4% 1/1/2051",
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      {
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      {
        "name": "PORT NY NJ 4% 7/15/2045 @",
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      {
        "name": "INDIANA ST FIN AUTH HLTH SYS R INSMED 12/49 FIXED 4",
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      {
        "name": "NYC GO 23A-4 Q=TD V1",
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      {
        "name": "CALIFORNIA COMMUNITY VAR",
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      {
        "name": "NY TRANSPRTN DEV -AMT",
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      {
        "name": "CHICAGO IL BRD OF EDU REGD B/E 5.00000000",
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        "weight": "0.00827851",
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      },
      {
        "name": "Black Belt Energy Gas District (The) (Gas), Series 2022 F, RB",
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      {
        "name": "CHICAGO IL BRD OF EDU DEDICATE REGD B/E 5.75000000",
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      {
        "name": "Jefferson (County of), AL, Series 2024, Ref. Revenue Wts.",
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      {
        "name": "California Community Choice Financing Authority, Series 2025G",
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      {
        "name": "Chandler Industrial Development Authority, Series 2019",
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      {
        "name": "RESTRUCTURED-SER A1",
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      {
        "name": "NY TRANS CORP 5% 6/30/2049 @",
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      {
        "name": "NY TRANS CORP 5% 7/1/46 @",
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      {
        "name": "NY TRANSPRTN DEV -AMT",
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      {
        "name": "ELGIN TX ISD 4% 8/1/2049",
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      {
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      {
        "name": "New York City Housing Development Corp",
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      {
        "name": "St. John the Baptist (Parish of), LA (Marathon Oil Corp.), Series 2017, Ref. RB",
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        "name": "Oneida County Local Development Corp., Series A",
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        "name": "LONGVIEW TX ISD 4% 2/15/2049",
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      {
        "name": "DENVER CO ARPT 5% 11/15/2032 @",
        "value": "569066.50",
        "weight": "0.00582696",
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      },
      {
        "name": "Black Belt Energy Gas District, Series D",
        "value": "555552.80",
        "weight": "0.00568859",
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      },
      {
        "name": "MTRO WA DC ARPT 5% 10/1/2030 @",
        "value": "554368.85",
        "weight": "0.00567646",
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      },
      {
        "name": "SALT VERDE FINL CORP GAS REV ARIZ SR",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000909466-26-000042",
      "as_of": "2025-11-30",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/909466/000090946626000042/0000909466-26-000042-index.htm"
    },
    {
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      "accession_no": "0000940400-26-014628",
      "as_of": "2026-02-27",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/889512/000094040026014628/0000940400-26-014628-index.htm"
    }
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}