MU Dark Pool Activity
Micron Technology Inc
Data as of Oct 27, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 27, 2026, FINRA reported 9.0M MU shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 2.9M of those shares (32.0%) were marked short or short-exempt, below MU's 30-day rolling average of 37.6% (z-score -0.85). Over the last 10 FINRA sessions (Oct 14, 2026 – Oct 27, 2026), MU's off-exchange short volume ratio ranged from 29.7% to 36.9% and averaged 33.3%; the latest reading is below that 10-session average.
Off-Exchange Volume
9.0M
Short Volume
2.9M
Short Volume Ratio
32.0%
30-Day Average
37.6%
z-score -0.85
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 14, 2026 | 12.8M | 3.8M | 29.8% |
| Oct 15, 2026 | 18.5M | 5.6M | 30.3% |
| Oct 16, 2026 | 14.5M | 4.5M | 30.9% |
| Oct 19, 2026 | 13.1M | 4.5M | 34.5% |
| Oct 20, 2026 | 9.7M | 2.9M | 29.7% |
| Oct 21, 2026 | 9.7M | 3.4M | 35.2% |
| Oct 22, 2026 | 14.5M | 5.4M | 36.9% |
| Oct 23, 2026 | 10.4M | 3.8M | 36.6% |
| Oct 26, 2026 | 11.0M | 4.0M | 36.7% |
| Oct 27, 2026 Latest | 9.0M | 2.9M | 32.0% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
MU dark pool FAQ
- How much MU off-exchange volume did FINRA report on Oct 27, 2026?
- FINRA's daily short sale volume file reported 9.0M MU shares in publicly disseminated off-exchange trades on Oct 27, 2026; 2.9M of those shares (32.0%) were marked short or short-exempt.
- Is MU's dark pool short volume ratio unusual right now?
- As of Oct 27, 2026, MU's short volume ratio of 32.0% is below MU's 30-day rolling average of 37.6% (z-score -0.85). Meridian's dark pool model does not flag this reading as an anomaly.
- What does the dark pool short volume ratio measure?
- FINRA publishes daily short sale volume for trades reported off-exchange to its trade reporting facilities, which include dark pools and other off-exchange venues. The ratio divides FINRA's ShortVolume figure, which counts both short and short-exempt sales, by the total off-exchange shares reported for that day. It is not short interest and not a directional signal: market-maker hedging and reporting mechanics can raise it, so it is context for other signals.