{
 "as_of": "2026-11-08",
 "cmr": "us-cm-kg/NYSE/NMZ-RI",
 "fence": "The page is the record's research on the issuer — no analyst, no rating, no view.",
 "markdown": "The page is the record's research on the issuer — no analyst, no rating, no view.\n\n# NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND (NYSE: NMZ-RI) — research page\n\nAs of 2026-11-08 · us-cm-kg · record version 1\n\n## Identity and listing\n\nThe issuer is NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND, listed on NYSE under ticker NMZ-RI. Its LEI is BN7VUB6JBYC7TTWZRZ58 and its ISIN is not on the record, though several US ISINs are carried against the LEI. Its security type is non-operating entity type (other), its segment and sector are not on the record, and its jurisdiction is United States, Massachusetts. Its status is listed, not halted.\n\n## The disclosure read\n\nThe record holds 61 filings in the window from 2025-11-08 to 2026-11-08, across 41 filing days, comprising 1 agm_egm, 12 directors_dealings, 4 prospectus and 44 regulatory_filing. The median gap between filing days is 6.5 days. The latest filing is dated 2026-11-03, is a regulatory_filing, and falls 5 days before the record date. The NYSE median is 64.0 filings, a median cadence gap of 6.0 days and a median latency of 4.0 days across 3256 issuers. The sector peer figures are not on the record for the US market.\n\n## Auditor\n\nThe auditor is not on the record, because the latest annual report cover carries no dei:AuditorName tag, and its location is not on the record. The record holds no auditor changes.\n\n## Events and halts\n\nThe record holds no listing, delisting or name change lines. The domicile change is not on the record, since EDGAR states no dated change of state of incorporation on a filing line. The segment move is not on the record, since exchange tier transfers are not EDGAR filings. The halt flag is listed, not halted.\n\n## Orderability\n\nThe outcome is not determinable under acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1, as of 2026-11-04. The chapter's orderability section carries no client_categories, so the outcome cannot name its client category.\n\n## Coverage\n\nThe record holds no research houses named on the issuer's investor-relations page, as none was found on the pages read.\n\n## Open research\n\nThe record holds no openly published research notes for the issuer, as none was found.\n\n## Licensed\n\nLicensed research: none loaded. A licensed row is served only to an agent whose firm holds that licence (licensor, entitlement). No licensed row is loaded.\n\n## As-of depth\n\nThe vintage is sealed. The record holds no sealed issuer years for this issuer. The market's earliest sealed date is 2021-01-04, and the live record began on 2026-09-12.\n\n## Sources\n\n7 source pages are named on this page; every value above carries its own source page and read date in the numbers.\n\n- https://www.sec.gov/files/company_tickers_exchange.json (identity.exchange)\n- https://data.sec.gov/submissions/CIK0001266585.json (identity.jurisdiction)\n- https://api.gleif.org/api/v1/lei-records/BN7VUB6JBYC7TTWZRZ58 (identity.lei)\n- https://mcp.us-cm-kg.ai/events/NYSE/NMZ-RI (the disclosure lines)\n- https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts (the halt flag)\n- https://mcp.us-cm-kg.ai/book/aio.json (the orderability chapter)\n- https://mcp.us-cm-kg.ai/record/NYSE/NMZ-RI (the record)\n",
 "market": "US",
 "node": "us-cm-kg",
 "numbers": {
  "as_of_depth": {
   "issuer_years_sealed": [],
   "live_record_began": "2026-09-12",
   "node_history_from": "2021-01-04",
   "node_years_sealed": [
    "2021",
    "2022",
    "2023",
    "2024",
    "2025",
    "2026"
   ],
   "record_version": 1,
   "sealed": true
  },
  "auditor": {
   "auditor": {
    "market": "US",
    "reason": "no dei:AuditorName tag on the latest annual report cover (foreign private issuers and older filings carry none)",
    "state": "not_on_record"
   },
   "auditor_firm_id": {
    "market": "US",
    "state": "not_on_record"
   },
   "auditor_location": {
    "market": "US",
    "state": "not_on_record"
   },
   "changes": []
  },
  "cmr": "us-cm-kg/NYSE/NMZ-RI",
  "coverage": {
   "count": 0,
   "houses": [],
   "pages_checked": [],
   "read_by": "Perplexity sonar (search) · page read by this rail",
   "read_date": "2026-11-11",
   "since": null,
   "state": "none_found"
  },
  "disclosure": {
   "against": {
    "exchange": {
     "issuers": 3256,
     "median_cadence_gap_days": 6,
     "median_filings": 64,
     "median_latency_days": 4,
     "name": "NYSE"
    },
    "sector": {
     "market": "US",
     "state": "not_on_record"
    }
   },
   "by_type": {
    "agm_egm": 1,
    "directors_dealings": 12,
    "prospectus": 4,
    "regulatory_filing": 44
   },
   "cadence_median_gap_days": 6.5,
   "filing_days": 41,
   "filings": 61,
   "latency_days": 5,
   "latest": [
    {
     "category": "N-23C-2",
     "date": "2026-11-03",
     "source": "https://www.sec.gov/Archives/edgar/data/1266585/000199937126024302/nmz-n23c2_110326.htm",
     "title": "N-23C-2 — NOTICE OF INTENTION TO REDEEM SECURITIES",
     "type": "regulatory_filing"
    },
    {
     "category": "497AD",
     "date": "2026-10-28",
     "source": "https://www.sec.gov/Archives/edgar/data/1266585/000199937126023768/nmz_497ad-102826.htm",
     "title": "497AD — FILING BY CERTAIN INVESTMENT COMPANIES",
     "type": "regulatory_filing"
    },
    {
     "category": "424B5",
     "date": "2026-10-23",
     "source": "https://www.sec.gov/Archives/edgar/data/1266585/000199937126023426/nmz-424b5_102326.htm",
     "title": "424B5 — PROSPECTUS SUPPLEMENT",
     "type": "prospectus"
    },
    {
     "category": "497AD",
     "date": "2026-10-22",
     "source": "https://www.sec.gov/Archives/edgar/data/1266585/000199937126023336/nmz-497ad_102226.htm",
     "title": "497AD — FORM 497AD",
     "type": "regulatory_filing"
    },
    {
     "category": "424B3",
     "date": "2026-10-02",
     "source": "https://www.sec.gov/Archives/edgar/data/1266585/000199937126021913/nmz-424b3_100226.htm",
     "title": "424B3 — PROSPECTUS FILED PURSUANT TO RULE 424(B)(3)",
     "type": "prospectus"
    }
   ],
   "latest_filing_date": "2026-11-03",
   "read": "the node's event lines (list_events_since), as get_filings serves them",
   "source": "https://mcp.us-cm-kg.ai/events/NYSE/NMZ-RI",
   "window": {
    "from": "2025-11-08",
    "to": "2026-11-08"
   }
  },
  "identity": {
   "exchange": {
    "read_by": "EDGAR company_tickers_exchange.json (SEC list of exchange-listed filers)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://www.sec.gov/files/company_tickers_exchange.json",
    "state": "sourced",
    "value": "NYSE"
   },
   "isin": {
    "market": "US",
    "reason": "several US ISINs on the LEI: US6706821039, US6706821112, US6706822029, US6706823019, US6706824009, US6706825097, US6706826087, US6706827077, US6706828067, US6706828554, US6706828638, US6706828711, US6706828893",
    "state": "not_on_record"
   },
   "jurisdiction": {
    "read_by": "EDGAR submissions API (issuer header as filed) (stateOfIncorporation)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://data.sec.gov/submissions/CIK0001266585.json",
    "state": "sourced",
    "value": "United States — Massachusetts"
   },
   "lei": {
    "read_by": "GLEIF name-exact (jurisdiction US-MA; GLEIF golden copy 2026-09-12)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://api.gleif.org/api/v1/lei-records/BN7VUB6JBYC7TTWZRZ58",
    "state": "sourced",
    "value": "BN7VUB6JBYC7TTWZRZ58"
   },
   "name": {
    "read_by": "EDGAR submissions API (issuer header as filed)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://data.sec.gov/submissions/CIK0001266585.json",
    "state": "sourced",
    "value": "NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND"
   },
   "sector": {
    "market": "US",
    "state": "not_on_record"
   },
   "security_type": {
    "read_by": "EDGAR submissions API (issuer header as filed)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://data.sec.gov/submissions/CIK0001266585.json",
    "state": "sourced",
    "value": "Non-operating entity type (other)"
   },
   "segment": {
    "market": "US",
    "state": "not_on_record"
   },
   "ticker": {
    "read_by": "EDGAR company_tickers_exchange.json (SEC list of exchange-listed filers)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://www.sec.gov/files/company_tickers_exchange.json",
    "state": "sourced",
    "value": "NMZ-RI"
   },
   "website": {
    "market": "US",
    "state": "not_on_record"
   }
  },
  "licensed": {
   "columns": [
    "licensor",
    "entitlement",
    "title",
    "date",
    "source"
   ],
   "rows": [],
   "rule": "A licensed row is served only to an agent whose firm holds that licence (licensor, entitlement). No licensed row is loaded."
  },
  "lifecycle": {
   "delisting": [],
   "domicile_change": {
    "market": "US",
    "reason": "EDGAR states no dated change of state of incorporation on a filing line",
    "state": "not_on_record"
   },
   "listing": [],
   "name_change": [],
   "segment_move": {
    "market": "US",
    "reason": "the exchanges' tier transfers are not EDGAR filings",
    "state": "not_on_record"
   }
  },
  "market": "US",
  "node": "us-cm-kg",
  "numbers_hash": "sha256:d12c42e4d268161e1c788229eab526ec90894beba05834cdaf7ba2af962a733a",
  "open_research": {
   "read_date": "2026-11-11",
   "rows": [],
   "state": "none_found"
  },
  "orderability": {
   "chapter_as_of": "2026-11-04",
   "client_categories": [],
   "determinable": false,
   "read": {
    "chapter": "https://mcp.us-cm-kg.ai/book/aio.json",
    "door": "https://mcp.us-cm-kg.ai/mcp",
    "tool": "get_orderability"
   },
   "reason": "the chapter's orderability section carries no client_categories: the outcome cannot name its client category",
   "rule_version": "acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1",
   "section": "us.aio.v8"
  },
  "record": {
   "as_of": "2026-11-08",
   "url": "https://mcp.us-cm-kg.ai/record/NYSE/NMZ-RI",
   "version": 1
  },
  "schema": "research-numbers v0.1 (USR-01, 2026-11-11)",
  "status": {
   "read_date": "2026-11-08",
   "source": "https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts",
   "value": "listed, not halted"
  }
 },
 "numbers_hash": "sha256:d12c42e4d268161e1c788229eab526ec90894beba05834cdaf7ba2af962a733a",
 "path": "/us/NYSE/NMZ-RI",
 "schema": "research-page v0.1 (USR-02, 2026-11-11)",
 "sections": [
  {
   "id": "identity",
   "text": "The issuer is NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND, listed on NYSE under ticker NMZ-RI. Its LEI is BN7VUB6JBYC7TTWZRZ58 and its ISIN is not on the record, though several US ISINs are carried against the LEI. Its security type is non-operating entity type (other), its segment and sector are not on the record, and its jurisdiction is United States, Massachusetts. Its status is listed, not halted.",
   "title": "Identity and listing"
  },
  {
   "id": "disclosure",
   "text": "The record holds 61 filings in the window from 2025-11-08 to 2026-11-08, across 41 filing days, comprising 1 agm_egm, 12 directors_dealings, 4 prospectus and 44 regulatory_filing. The median gap between filing days is 6.5 days. The latest filing is dated 2026-11-03, is a regulatory_filing, and falls 5 days before the record date. The NYSE median is 64.0 filings, a median cadence gap of 6.0 days and a median latency of 4.0 days across 3256 issuers. The sector peer figures are not on the record for the US market.",
   "title": "The disclosure read"
  },
  {
   "id": "auditor",
   "text": "The auditor is not on the record, because the latest annual report cover carries no dei:AuditorName tag, and its location is not on the record. The record holds no auditor changes.",
   "title": "Auditor"
  },
  {
   "id": "events",
   "text": "The record holds no listing, delisting or name change lines. The domicile change is not on the record, since EDGAR states no dated change of state of incorporation on a filing line. The segment move is not on the record, since exchange tier transfers are not EDGAR filings. The halt flag is listed, not halted.",
   "title": "Events and halts"
  },
  {
   "id": "orderability",
   "text": "The outcome is not determinable under acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1, as of 2026-11-04. The chapter's orderability section carries no client_categories, so the outcome cannot name its client category.",
   "title": "Orderability"
  },
  {
   "id": "coverage",
   "text": "The record holds no research houses named on the issuer's investor-relations page, as none was found on the pages read.",
   "title": "Coverage"
  },
  {
   "id": "open_research",
   "text": "The record holds no openly published research notes for the issuer, as none was found.",
   "title": "Open research"
  },
  {
   "id": "licensed",
   "text": "Licensed research: none loaded. A licensed row is served only to an agent whose firm holds that licence (licensor, entitlement). No licensed row is loaded.",
   "title": "Licensed"
  },
  {
   "id": "depth",
   "text": "The vintage is sealed. The record holds no sealed issuer years for this issuer. The market's earliest sealed date is 2021-01-04, and the live record began on 2026-09-12.",
   "title": "As-of depth"
  },
  {
   "id": "sources",
   "text": "7 source pages are named on this page; every value above carries its own source page and read date in the numbers.",
   "title": "Sources"
  }
 ],
 "sources": [
  {
   "for": "identity.exchange",
   "source": "https://www.sec.gov/files/company_tickers_exchange.json"
  },
  {
   "for": "identity.jurisdiction",
   "source": "https://data.sec.gov/submissions/CIK0001266585.json"
  },
  {
   "for": "identity.lei",
   "source": "https://api.gleif.org/api/v1/lei-records/BN7VUB6JBYC7TTWZRZ58"
  },
  {
   "for": "the disclosure lines",
   "source": "https://mcp.us-cm-kg.ai/events/NYSE/NMZ-RI"
  },
  {
   "for": "the halt flag",
   "source": "https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts"
  },
  {
   "for": "the orderability chapter",
   "source": "https://mcp.us-cm-kg.ai/book/aio.json"
  },
  {
   "for": "the record",
   "source": "https://mcp.us-cm-kg.ai/record/NYSE/NMZ-RI"
  }
 ],
 "title": "NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND (NMZ-RI) — research page",
 "writer": {
  "by": "Claude through the platform account, Haiku class; one pass; checked against the numbers",
  "engine": "claude-haiku-5-5"
 }
}