WSO Dark Pool Activity
Watsco, Inc.
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 332K WSO shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 234K of those shares (70.5%) were marked short or short-exempt, below WSO's 30-day rolling average of 70.8% (z-score -0.03). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), WSO's off-exchange short volume ratio ranged from 65.7% to 76.9% and averaged 69.4%; the latest reading is above that 10-session average.
Off-Exchange Volume
332K
Short Volume
234K
Short Volume Ratio
70.5%
30-Day Average
70.8%
z-score -0.03
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 154K | 105K | 68.2% |
| Oct 13, 2026 | 220K | 144K | 65.7% |
| Oct 14, 2026 | 226K | 154K | 68.3% |
| Oct 15, 2026 | 245K | 165K | 67.2% |
| Oct 16, 2026 | 260K | 177K | 68.0% |
| Oct 19, 2026 | 276K | 202K | 73.1% |
| Oct 20, 2026 | 339K | 238K | 70.2% |
| Oct 21, 2026 | 189K | 125K | 66.1% |
| Oct 22, 2026 | 547K | 420K | 76.9% |
| Oct 23, 2026 Latest | 332K | 234K | 70.5% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
WSO dark pool FAQ
- How much WSO off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 332K WSO shares in publicly disseminated off-exchange trades on Oct 23, 2026; 234K of those shares (70.5%) were marked short or short-exempt.
- Is WSO's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, WSO's short volume ratio of 70.5% is below WSO's 30-day rolling average of 70.8% (z-score -0.03). 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.