Nuveen Municipal High Income Opportunity Fund, $0.01 par value, per share (NMZ)
NMZ moved a median of -0.05% 30 minutes after news, and 0.00% by the close. How NMZ actually reacts to news — the realized, point-in-time move the market made, measured across 83 labeled events over the last three years with zero look-ahead.
NMZ’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 31% | 80 |
| 30-min | -0.05% | 37% | 83 |
| 60-min | -0.04% | 36% | 83 |
| to close | 0.00% | 46% | 83 |
| Middle 50% of NMZ reactions | -0.14% to +0.06% |
|---|---|
| Median reaction (30-min) | -0.05% |
| Measured reactions | 83 |
Half of all Nuveen Municipal High Income Opportunity Fund, $0.01 par value, per share news events land between -0.14% and +0.06% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when NMZ moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to NMZ's baseline. Nothing else.
Recent NMZ events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form NPORT-P NUVEEN MUNICIPAL HIGH For: Jul 31 | SEC filing · Form NPORT-P | SEC EDGAR | +0.22% | -0.88% | |
| Form N-PX NUVEEN MUNICIPAL HIGH For: Jun 30 | SEC filing · Form N-PX | SEC EDGAR | +0.00% | -0.39% | |
| Form DEF 14A NUVEEN MUNICIPAL HIGH For: Aug 13 | SEC filing · Form DEF | SEC EDGAR | -0.10% | -0.19% | |
| Form N-CSRS NUVEEN MUNICIPAL HIGH For: Apr 30 | SEC filing · Form N-CSRS | SEC EDGAR | -0.07% | +0.11% | |
| Form NPORT-P NUVEEN MUNICIPAL HIGH For: Apr 30 | SEC filing · Form NPORT-P | SEC EDGAR | +0.01% | +0.53% | |
| Form POS EX NUVEEN MUNICIPAL HIGH | SEC filing · Form POS | SEC EDGAR | -0.10% | +0.48% | |
| Form N-23C-2 NUVEEN MUNICIPAL HIGH For: May 01 | SEC filing · Form N-23C-2 | SEC EDGAR | -0.05% | +0.05% | |
| Nuveen Municipal Closed-End Funds Announce Completion of Mergers | Press release | Business Wire | +0.24% | +0.00% | |
| Form NPORT-P NUVEEN MUNICIPAL HIGH For: Jan 31 | SEC filing · Form NPORT-P | SEC EDGAR | -0.05% | +0.29% | |
| Form N-CEN NUVEEN MUNICIPAL HIGH For: Oct 31 | SEC filing · Form N-CEN | SEC EDGAR | +0.14% | +0.14% | |
| Form N-CSR NUVEEN MUNICIPAL HIGH For: Oct 31 | SEC filing · Form N-CSR | SEC EDGAR | +0.00% | -0.58% | |
| Form NPORT-P NUVEEN MUNICIPAL HIGH For: Oct 31 | SEC filing · Form NPORT-P | SEC EDGAR | -0.20% | +0.89% | |
| Form EFFECT NUVEEN MUNICIPAL HIGH | SEC filing · Form EFFECT | SEC EDGAR | +0.05% | -0.39% | |
| Form N-14 8C/A NUVEEN MUNICIPAL HIGH | SEC filing · Form N-14 | SEC EDGAR | +0.14% | -0.67% | |
| Form N-14 8C/A NUVEEN MUNICIPAL HIGH | SEC filing · Form N-14 | SEC EDGAR | -0.14% | -0.09% | |
| Form N-23C-2 NUVEEN MUNICIPAL HIGH For: Oct 31 | SEC filing · Form N-23C-2 | SEC EDGAR | -0.09% | +0.19% | |
| Form N-14 8C NUVEEN MUNICIPAL HIGH | SEC filing · Form N-14 | SEC EDGAR | +0.10% | +1.05% | |
| Form NPORT-P NUVEEN MUNICIPAL HIGH For: Jul 31 | SEC filing · Form NPORT-P | SEC EDGAR | +0.05% | +0.14% | |
| Form N-PX NUVEEN MUNICIPAL HIGH For: Jun 30 | SEC filing · Form N-PX | SEC EDGAR | +0.00% | -0.05% | |
| Form N-CSRS NUVEEN MUNICIPAL HIGH For: Apr 30 | SEC filing · Form N-CSRS | SEC EDGAR | — | -0.10% | |
| Form DEF 14A NUVEEN MUNICIPAL HIGH For: Aug 14 | SEC filing · Form DEF | SEC EDGAR | -0.10% | +0.38% | |
| Form NPORT-P NUVEEN MUNICIPAL HIGH For: Apr 30 | SEC filing · Form NPORT-P | SEC EDGAR | +0.05% | +0.54% | |
| Form N-23C-2 NUVEEN MUNICIPAL HIGH For: Apr 28 | SEC filing · Form N-23C-2 | SEC EDGAR | +0.19% | +0.67% | |
| Form NPORT-P NUVEEN MUNICIPAL HIGH For: Jan 31 | SEC filing · Form NPORT-P | SEC EDGAR | -0.09% | -0.50% | |
| Form N-CEN NUVEEN MUNICIPAL HIGH For: Oct 31 | SEC filing · Form N-CEN | SEC EDGAR | +0.13% | +0.35% | |
| Form N-CSR NUVEEN MUNICIPAL HIGH For: Oct 31 | SEC filing · Form N-CSR | SEC EDGAR | +0.00% | -0.09% | |
| Form NPORT-P NUVEEN MUNICIPAL HIGH For: Oct 31 | SEC filing · Form NPORT-P | SEC EDGAR | -0.05% | +0.05% | |
| Form N-23C-2 NUVEEN MUNICIPAL HIGH For: Oct 28 | SEC filing · Form N-23C-2 | SEC EDGAR | -0.18% | +0.27% | |
| Form NPORT-P NUVEEN MUNICIPAL HIGH For: Jul 31 | SEC filing · Form NPORT-P | SEC EDGAR | -0.04% | -0.09% | |
| Form N-PX NUVEEN MUNICIPAL HIGH For: Jun 30 | SEC filing · Form N-PX | SEC EDGAR | +0.00% | +0.70% | |
| Form N-CSRS NUVEEN MUNICIPAL HIGH For: Apr 30 | SEC filing · Form N-CSRS | SEC EDGAR | +0.00% | -1.24% | |
| Form DEF 14A NUVEEN MUNICIPAL HIGH For: Aug 08 | SEC filing · Form DEF | SEC EDGAR | +0.28% | -0.55% | |
| Form NPORT-P NUVEEN MUNICIPAL HIGH For: Apr 30 | SEC filing · Form NPORT-P | SEC EDGAR | +0.09% | +0.46% | |
| Form N-PX/A NUVEEN MUNICIPAL HIGH For: Jun 30 | SEC filing · Form N-PX | SEC EDGAR | +0.00% | +0.00% | |
| Form NPORT-P NUVEEN MUNICIPAL HIGH For: Jan 31 | SEC filing · Form NPORT-P | SEC EDGAR | -0.05% | +0.19% | |
| Form N-23C-2 NUVEEN MUNICIPAL HIGH For: Mar 20 | SEC filing · Form N-23C-2 | SEC EDGAR | -0.05% | +0.00% | |
| Form N-2ASR NUVEEN MUNICIPAL HIGH | SEC filing · Form N-2ASR | SEC EDGAR | +0.10% | +0.57% | |
| Form 8-K NUVEEN MUNICIPAL HIGH For: Mar 06 | SEC filing · Form 8-K | SEC EDGAR | -0.05% | +0.00% | |
| Form N-CEN NUVEEN MUNICIPAL HIGH For: Oct 31 | SEC filing · Form N-CEN | SEC EDGAR | +0.00% | -0.31% | |
| Form N-CSR NUVEEN MUNICIPAL HIGH For: Oct 31 | SEC filing · Form N-CSR | SEC EDGAR | +0.05% | +0.61% | |
| Form NPORT-P NUVEEN MUNICIPAL HIGH For: Oct 31 | SEC filing · Form NPORT-P | SEC EDGAR | +0.07% | -0.60% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the NMZ section they belong to.
Where else NMZ is measured.
NMZ earnings → · Analyst actions → · SEC filings →
Other Financial Services names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Electric Financial Corp Ltd (ELF_TSE) | 83 | 0.00% | 35% |
| John Hancock Tax Advantaged Dividend Income Fund Common Shares of Beneficial Interest (HTD) | 83 | 0.00% | 49% |
| Conifer Holdings, Inc. (CNFR) | 82 | +0.24% | 53% |
| EV OH MUNI-BOND COMMON (EIO) | 82 | 0.00% | 33% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Financial Services names, measured the same way →
Every ticker we measure the same way24
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How AVGO actually reacts to news, measured.
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Exxon Mobil (XOM)
How XOM actually reacts to news, measured.
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How HD actually reacts to news, measured.
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How COST actually reacts to news, measured.
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How ORCL actually reacts to news, measured.
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How CRM actually reacts to news, measured.
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Browse all tickers
Every name we’ve measured, in one place.
How the numbers are made.
How is Nuveen Municipal High Income Opportunity Fund, $0.01 par value, per share's median reaction calculated?
Every labeled NMZ news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 83 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 37% of NMZ's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does NMZ's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.