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Public snapshot

MUI Income Quality Score

BlackRock Municipal Income Fund, Inc. (MUI) has an Income Quality Score of 53/100, classified as a Question Mark with low confidence, based on a 10-year income and total-return history.

BlackRock Municipal Income Fund, Inc. (MUI) is a closed-end fund and is part of the IQ Score universe.

July 2026 snapshotAs of July 31, 2026Lookback: 10-year
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Long-term focused10-year income and total-return analysis
Data-drivenObjective scoring across 3 quality, distribution and risk signals
Clear classificationFriends to own. Foes to avoid.
IQ Score
53/100
Question MarkLow confidence
Asset Type
CEF
Exchange
NYSE
Trailing Yield (TTM)
Not published
No normalized trailing yield is published for closed-end funds in this snapshot.
Rank in CEF Universe
166 of 358
Lookback
10-year
Data as of
July 31, 2026
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About this snapshot
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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MUIBlackRock Municipal Income Fund, Inc.
53Question MarkLow confidence
Snapshot
2026-07
Data as of
2026-07-31
Lookback
10-year
Asset type
Closed-End Fund

IQ Score History

Not enough published history yet to draw a trend.

Signals & Drivers

IQ signal scores

Each signal is normalised to 0–100 and combined by weight into the overall IQ Score.

Economic Payout Coverage
37/100
Working Capital Preservation
59/100
Distribution Trend
100/100

What is working

  • Distributions growing year-over-year

Flags & gates

  • Stale Prices

Distribution Safety

10Years raised
0Years cut
23Years of data
DownCurrent trend
  1. 20030.288Held
  2. 20041.0519Raised
  3. 20051.0913Raised
  4. 20060.898Lower total
  5. 20070.732Lower total
  6. 20080.714Lower total
  7. 20090.7485Raised
  8. 20100.8178Raised
  9. 20110.859Raised
  10. 20120.9995Raised
  11. 20130.9182Lower total
  12. 20140.8296Lower total
  13. 20150.9759Raised
  14. 20160.8457Lower total
  15. 20170.6315Lower total
  16. 20180.578Lower total
  17. 20190.534Lower total
  18. 20200.5945Raised
  19. 20210.648Raised
  20. 20220.6066Lower total
  21. 20230.4291Lower total
  22. 20240.66Raised
  23. 20250.1508Lower total

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.

The IQ Score is a research classification of historical income quality. It is not investment advice, not a recommendation and not a prediction of future returns.

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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.