{
  "schema_version": "1",
  "accession_number": "0001999371-26-023426",
  "cik": "0001266585",
  "filer_name": "NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND  (NMZ)  (CIK 0001266585)",
  "form_type": "424B5",
  "is_amendment": false,
  "filed_at": "2026-10-23T00:00:00.000Z",
  "indexed_at": "2026-10-23T20:23:39.893Z",
  "edgar_url": "https://www.sec.gov/Archives/edgar/data/1266585/000199937126023426/0001999371-26-023426-index.htm",
  "secfilingdex_url": "https://secfilingdex.com/filing/0001999371-26-023426/",
  "license": "U.S. government works are public domain (17 U.S.C. § 105). Editorial annotations CC-BY-4.0.",
  "source": "SEC EDGAR"
}