CMU · Mfs High Yield Municipal Trust · Short Interest
Shares sold short and not yet covered, reported twice monthly. Days to cover is the reported short position divided by average daily volume.
CMU Latest Reported Short Interest
FINRA reported 206,304 CMU shares sold short as of the May 29, 2026 settlement date, a decrease of 29,002 shares. Days to cover was 2.36 based on FINRA's reported average daily volume.
Official FINRA short-interest data · share counts are restated for subsequent splits of this listing
Options positioning & squeeze sensitivity
Nearest expiration after today within 30 calendar days; same-day expirations and later maturities are excluded.
A complete options reference is unavailable.
Open interest has both a buyer and a seller; it does not reveal dealer hedge direction. Gross gamma sums both calls and puts without netting and uses a local 1% price-change approximation. It measures sensitivity, not predicted buying or a squeeze probability.
Assessment prepared 2026-09-13 21:36 UTC. Options model values may come from a cached snapshot; their original computation time is not supplied. Open interest has its own effective date.
Short Interest History
| Settlement Date | Current Position | Previous Position | Change | Days to Cover |
|---|---|---|---|---|
|
2026-09-30
Scheduled
FINRA publishes Oct 9
|
— | — | — | — |
|
2026-09-15
Scheduled
FINRA publishes Sep 24
|
— | — | — | — |
| 2026-05-29 | 206,304 | 235,306 | -29,002 | 2.36 |
| 2026-05-15 | 235,306 | 199,820 | +35,486 | 1.00 |
| 2026-04-30 | 199,820 | 185,628 | +14,192 | 1.00 |
| 2026-04-15 | 185,628 | 163,286 | +22,342 | 1.00 |
| 2026-03-31 | 163,286 | 141,462 | +21,824 | 3.01 |
| 2026-03-13 | 141,462 | 141,560 | -98 | 1.00 |
| 2026-02-27 | 141,560 | 144,435 | -2,875 | 2.11 |
| 2026-02-13 | 144,435 | 146,486 | -2,051 | 2.32 |
| 2026-01-30 | 146,486 | 141,464 | +5,022 | 2.73 |
| 2026-01-15 | 141,464 | 67,531 | +73,933 | 2.22 |
| 2025-12-31 | 67,531 | 73,098 | -5,567 | 1.00 |
| 2025-12-15 | 73,098 | 28,539 | +44,559 | 1.00 |
| 2025-11-28 | 28,539 | 5,371 | +23,168 | 1.00 |
| 2025-11-14 | 5,371 | 20,170 | -14,799 | 1.00 |
| 2025-10-31 | 20,170 | 9,052 | +11,118 | 1.00 |
| 2025-10-15 | 9,052 | 9,177 | -125 | 1.00 |
| 2025-09-30 | 9,177 | 1,807 | +7,370 | 1.00 |
| 2025-09-15 | 1,807 | 22,561 | -20,754 | 1.00 |
Full FINRA short interest reporting calendar