MUB Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
MUB dark pool volume for the week of 2026-07-20: 4.1M shares traded across 23 ATS venues with a total notional value of $431.7M. Volume is up 22.9% week-over-week. Off-exchange dark pool transactions account for 17.6% of total MUB market volume — elevated above the typical 10–14% institutional baseline, potentially signaling active accumulation or distribution. Primary routing venues include , INTELLIGENT CROSS LLC, SIGMA X2.
Dark pool activity in MUB reflects institutional order flow executing on Alternative Trading Systems (ATS) registered with the SEC — private venues where large-block trades are matched away from public exchanges to minimize price impact. StonkWhisper ingests FINRA-published ATS volume data to track these off-exchange flows. Sustained elevation in dark pool percentage — particularly when concentrated at specific venues — can indicate institutional accumulation or distribution ahead of significant price moves. The interactive charts below show 12-week historical volume and complete venue breakdown for MUB.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 4.1M | 17.6% | +22.9% |
| 2026-07-13 | 3.3M | — | -13.3% |
| 2026-07-06 | 3.8M | — | +52.0% |
| 2026-06-29 | 2.5M | — | +3.4% |
| 2026-06-22 | 2.4M | — | +4.2% |
| 2026-06-15 | 2.3M | — | -29.9% |
| 2026-06-08 | 3.3M | — | -9.2% |
| 2026-06-01 | 3.7M | — | +22.9% |
| 2026-05-25 | 3.0M | — | -10.6% |
| 2026-05-18 | 3.3M | — | +2.1% |
| 2026-05-11 | 3.3M | — | +35.3% |
| 2026-05-04 | 2.4M | — | -19.6% |