The page is the record's research on the issuer — no analyst, no rating, no view.

# NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND (NYSE: NMZ) — research page

As of 2026-11-08 · us-cm-kg · record version 1

## Identity and listing

The issuer is NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND, listed on NYSE under ticker NMZ, with ISIN US6706821039 and LEI BN7VUB6JBYC7TTWZRZ58. Its security type is non-operating entity type (other), and its jurisdiction is United States, Massachusetts. Segment and sector are not on the record. Its listing status is listed, not halted.

## The disclosure read

The record holds 61 filings in the twelve months to 2026-11-08, across 41 filing days: 44 regulatory filings, 12 directors' dealings, 4 prospectuses and 1 AGM/EGM filing. The median gap between filing days is 6.5 days, against a NYSE median of 6.0 days. The record holds 5 days from the latest filing to the record date, against a NYSE median of 4.0 days. The latest filing is dated 2026-11-03 and is a regulatory filing. The sector median is not on the record for the US market.

## Auditor

The auditor is not on the record, because the latest annual report cover carries no dei:AuditorName tag. The auditor's location is not on the record. The record holds no auditor changes.

## Events and halts

The record holds no listing, delisting or name change lines. Domicile change is not on the record, because EDGAR states no dated change of state of incorporation on a filing line. Segment move is not on the record, because the exchanges' tier transfers are not EDGAR filings. The issuer is listed, not halted.

## Orderability

The outcome is not determinable, because the chapter's orderability section carries no client categories and so the outcome cannot name its client category. The rule version is acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1, and the chapter is as of 2026-11-04.

## Coverage

No research houses were found on the issuer's own investor-relations page.

## Open research

No openly published research notes were found on the record.

## Licensed

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.

## As-of depth

The record holds sealed years 2021, 2022, 2023, 2024, 2025 and 2026 for this issuer. The market's earliest sealed date is 2021-01-04, and the live record began on 2026-09-12.

## Sources

8 source pages are named on this page; every value above carries its own source page and read date in the numbers.

- https://www.sec.gov/files/company_tickers_exchange.json (identity.exchange)
- https://www.sec.gov/data-research/sec-markets-data/fails-deliver-data (identity.isin)
- https://data.sec.gov/submissions/CIK0001266585.json (identity.jurisdiction)
- https://mapping.gleif.org/api/v2/isin-lei/latest/download (identity.lei)
- https://mcp.us-cm-kg.ai/events/NYSE/NMZ (the disclosure lines)
- https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts (the halt flag)
- https://mcp.us-cm-kg.ai/book/aio.json (the orderability chapter)
- https://mcp.us-cm-kg.ai/record/NYSE/NMZ (the record)

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