NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND

Over the past 90 days, Nuveen Municipal High Income Opportunity Fund (NMZ) has recorded zero cyber incidents and zero red-flag 8-K filings—no bankruptcy notices, delistings, restatements, or officer departures detected in our ingestion window. This low-signal period provides a baseline, though absence of recent events does not indicate absence of structural risk; the fund's leverage, distribution sustainability, and municipal credit exposure warrant deeper analysis. The full $49 Report extends the lookback to twelve months of SEC filings, calculates dilution and leverage risk scores, contextualizes any 8-K activity, and flags AI-detected anomalies in financing and distribution patterns. The full $49 Report adds comprehensive risk scoring, 12-month filing history, and structural vulnerability assessment.