SPYM Dark Pool Activity
ATS off-exchange volume intelligence · Week of 2026-07-20
SPYM dark pool volume for the week of 2026-07-20: 4.9M shares traded across 25 ATS venues with a total notional value of $432.8M. Volume is up 1.3% week-over-week. Off-exchange dark pool transactions account for 9.9% of total SPYM market volume — within the normal institutional baseline range. Primary routing venues include , INTELLIGENT CROSS LLC, SIGMA X2.
Dark pool activity in SPYM 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 SPYM.
Weekly History
| Week | Shares | DP % | WoW |
|---|---|---|---|
| 2026-07-20 | 4.9M | 9.9% | +1.3% |
| 2026-07-13 | 4.9M | — | -49.0% |
| 2026-07-06 | 9.6M | — | +159.4% |
| 2026-06-29 | 3.7M | — | -46.3% |
| 2026-06-22 | 6.9M | — | +65.0% |
| 2026-06-15 | 4.2M | — | -42.6% |
| 2026-06-08 | 7.3M | — | +13.6% |
| 2026-06-01 | 6.4M | 11.1% | +33.8% |
| 2026-05-25 | 4.8M | — | +1.1% |
| 2026-05-18 | 4.7M | — | +4.9% |
| 2026-05-11 | 4.5M | — | +7.8% |
| 2026-05-04 | 4.2M | — | -14.9% |