Public snapshot
NMZ Income Quality Score
Nuveen Municipal High Income Opportunity Fund (NMZ) has an Income Quality Score of 42/100, classified as a Question Mark with high confidence, based on a 10-year income and total-return history.
Nuveen Municipal High Income Opportunity Fund (NMZ) is a closed-end fund and is part of the IQ Score universe.
This is the public July 2026 snapshot. Public snapshots are delayed and frozen: once released, a month's scores do not change, and current data is reserved for members. The July 2026 snapshot is published as the public launch snapshot.
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IQ Score History
Reconstructed monthly scores are computed from current data and methodology. Published snapshots are the frozen monthly releases, marked on the line. Where the methodology changed, the line is broken rather than joined across the change.
Signals & Drivers
IQ signal scores
Each signal is normalised to 0–100 and combined by weight into the overall IQ Score.
What to watch
- Distributions exceed long-term total return
- 1–2 years with a material annual distribution decline
Distribution Safety
High confidence (10-year history)
- 20041.1301Held
- 20051.068Lower total
- 20061.0307Lower total
- 20071.0713Raised
- 20081.0251Lower total
- 20090.9228Lower total
- 20101.002Raised
- 20110.9666Lower total
- 20120.8067Lower total
- 20130.808Held
- 20140.9222Raised
- 20150.9215Held
- 20160.8893Lower total
- 20170.8091Lower total
- 20180.716Cut
- 20190.708Held
- 20200.734Raised
- 20210.771Raised
- 20220.7275Lower total
- 20230.537Cut
- 20240.686Raised
- 20250.786Raised
- 20260.393Partial year
Distributions per year, from the frozen distribution-stability signal. “Lower total” means the calendar-year sum was smaller than the prior year (often a special-distribution rolloff or timing shift), but did not decline more than the engine's 10% material-decline threshold — see Years Cut above for years that did.
Browse the full Income Quality Score research across CEFs, BDCs, REITs and income ETFs.
IQ Score is a long-duration quality and distribution-safety classification for income assets. It is research based on historical data, not personal investment advice, and it does not tell you what to buy or sell. Figures reflect a delayed public snapshot and may differ from current data.