TSM Dark Pool Activity
Taiwan Semiconductor Manufacturing Co Ltd
Data as of Oct 23, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Oct 23, 2026, FINRA reported 3.7M TSM shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 1.2M of those shares (31.7%) were marked short or short-exempt, below TSM's 30-day rolling average of 40.5% (z-score -1.13). Over the last 10 FINRA sessions (Oct 12, 2026 – Oct 23, 2026), TSM's off-exchange short volume ratio ranged from 19.2% to 49.6% and averaged 36.0%; the latest reading is below that 10-session average.
Off-Exchange Volume
3.7M
Short Volume
1.2M
Short Volume Ratio
31.7%
30-Day Average
40.5%
z-score -1.13
Daily readings — last 10 FINRA sessions
| Date | Off-exchange shares | Short shares | Short ratio |
|---|---|---|---|
| Oct 12, 2026 | 3.5M | 1.4M | 40.2% |
| Oct 13, 2026 | 3.5M | 665K | 19.2% |
| Oct 14, 2026 | 6.2M | 1.8M | 28.2% |
| Oct 15, 2026 | 9.3M | 4.0M | 43.3% |
| Oct 16, 2026 | 5.8M | 2.5M | 43.3% |
| Oct 19, 2026 | 5.2M | 1.6M | 31.9% |
| Oct 20, 2026 | 4.5M | 1.7M | 37.6% |
| Oct 21, 2026 | 4.3M | 1.5M | 34.9% |
| Oct 22, 2026 | 7.3M | 3.6M | 49.6% |
| Oct 23, 2026 Latest | 3.7M | 1.2M | 31.7% |
Source: FINRA daily short sale volume (off-exchange). Ratio = ShortVolume ÷ TotalVolume for the day.
TSM dark pool FAQ
- How much TSM off-exchange volume did FINRA report on Oct 23, 2026?
- FINRA's daily short sale volume file reported 3.7M TSM shares in publicly disseminated off-exchange trades on Oct 23, 2026; 1.2M of those shares (31.7%) were marked short or short-exempt.
- Is TSM's dark pool short volume ratio unusual right now?
- As of Oct 23, 2026, TSM's short volume ratio of 31.7% is below TSM's 30-day rolling average of 40.5% (z-score -1.13). 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.