CBRS Dark Pool Activity
Cerebras Systems Inc
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 3.9M CBRS shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 1.9M of those shares (49.4%) were marked short or short-exempt, below CBRS's 30-day rolling average of 56.5% (z-score -0.96). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), CBRS's off-exchange short volume ratio ranged from 37.7% to 68.5% and averaged 53.7%; the latest reading is below that 10-session average.
Off-Exchange Volume
3.9M
Short Volume
1.9M
Short Volume Ratio
49.4%
30-Day Average
56.5%
z-score -0.96
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 8.9M | 6.1M | 68.5% |
| Oct 13, 2026 | 3.6M | 2.1M | 57.9% |
| Oct 14, 2026 | 4.9M | 2.8M | 56.8% |
| Oct 15, 2026 | 3.9M | 2.4M | 60.1% |
| Oct 16, 2026 | 5.7M | 3.6M | 63.9% |
| Oct 19, 2026 | 5.8M | 2.7M | 45.9% |
| Oct 20, 2026 | 3.7M | 1.4M | 37.7% |
| Oct 21, 2026 | 3.9M | 2.0M | 51.3% |
| Oct 22, 2026 | 4.8M | 2.2M | 45.5% |
| Oct 23, 2026 Latest | 3.9M | 1.9M | 49.4% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
CBRS dark pool FAQ
- How much CBRS off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 3.9M CBRS shares in publicly disseminated off-exchange trades on Oct 23, 2026; 1.9M of those shares (49.4%) were marked short or short-exempt.
- Is CBRS's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, CBRS's short volume ratio of 49.4% is below CBRS's 30-day rolling average of 56.5% (z-score -0.96). 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.