Quantumsphere Acquisition Corp. Rights (QUMSR) short interest & short volume · 4K shares short
Quantumsphere Acquisition Corp. Rights official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
QUMSR short interest fell 22.1% to 4K shares in the Oct 15, 2026 report (1.0 days to cover). Daily short volume averaged 61.3% of volume over the last 20 sessions, down from 79.3% the 20 sessions before, the 36th percentile of its own 20-day averages since Sep 30, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 4K
- prior 5K
- % of float
- —
- no float on file
- Days to cover
- 1.0
- avg vol 12K
- Change vs prior report
- -22.1%
Days to cover is short interest divided by FINRA's average daily volume for the period: how many average days of trading it would take shorts to buy back.
Source: FINRA equity short interest (twice monthly) · Settlement Oct 15, 2026
Daily short volume
Share of each day's volume sold short · FINRA Reg SHO
- Latest (Oct 29)
- 80.0%
- 16 of 20
- 20-day average
- 61.3%
- prior 79.3%
- Percentile vs own history
- 36th
- 47 periods since 2025
Loading prices…
Source: FINRA Reg SHO daily short sale volume · Latest Oct 29, 2026
Short squeeze score (model)
Model, not a forecast: 40 pts short interest % of float (full at 30%), 25 pts days to cover (full at 10), 15 pts rise in short interest since the prior report (full at +50%), 20 pts price gain since the settlement date (full at +25%). Missing inputs score 0.
QUMSR's squeeze score and its inputs with Lician Pro.Start 3-day trial — $149/yr
Market-wide: most shorted stocks, biggest changes and unusual short volume · QUMSR overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-10-29 | 16 | 20 | 80.0% |
| 2026-10-23 | 58 | 58 | 100.0% |
| 2026-10-16 | 27,000 | 28,491 | 94.8% |
| 2026-10-13 | 9 | 51 | 17.6% |
| 2026-10-12 | 1,156 | 6,264 | 18.4% |
| 2026-10-08 | 5 | 5 | 100.0% |
| 2026-09-28 | 1,222 | 2,444 | 50.0% |
| 2026-09-08 | 107 | 676 | 15.8% |
| 2026-09-04 | 35,810 | 92,595 | 38.7% |
| 2026-09-03 | 204 | 370 | 55.1% |
QUMSR short interest FAQ
What is QUMSR's short interest?
Quantumsphere Acquisition Corp. Rights (QUMSR) had 4K shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report.
How many days to cover does QUMSR have?
1.0 days: 4K shares short divided by an average daily volume of 12K for the Oct 15, 2026 period.
Is QUMSR short interest rising or falling?
QUMSR short interest fell (-22.1%) from 5K to 4K shares in the Oct 15, 2026 report.
Is QUMSR a short squeeze candidate?
Lician's squeeze watch scores QUMSR 3 out of 100 (low) from the Oct 15, 2026 report: days to cover 2.5/25, change in short interest vs prior report 0/15. It is a transparent model of how crowded the short side is, not a forecast that a squeeze will happen.
What share of QUMSR daily volume is sold short?
61.3% on average over the last 20 sessions to Oct 29, 2026 (FINRA Reg SHO daily short volume; the 36th percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was QUMSR's latest FINRA short volume?
On Oct 29, 2026, cached FINRA short volume for Quantumsphere Acquisition Corp. Rights (QUMSR) was 16 shares, 80.0% of 20 total volume.
How many QUMSR short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for Quantumsphere Acquisition Corp. Rights (QUMSR), from Sep 3, 2026 through Oct 29, 2026.
How did QUMSR short volume percent change from the prior cached session?
Cached FINRA short volume for Quantumsphere Acquisition Corp. Rights (QUMSR) moved from 100.0% on Oct 23, 2026 to 80.0% on Oct 29, 2026, down 20.0 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.