Question 1

What is dark pool trading activity for OPT?

Accepted Answer

Dark pool activity for OPT represents trades executed on Alternative Trading Systems (ATS) — private exchanges where institutional investors trade large blocks of shares away from public exchanges. StonkWhisper tracks this off-exchange volume using FINRA ATS transparency data, updated on a two-week delay.

Question 2

How do I interpret dark pool data for OPT?

Accepted Answer

Key metrics for OPT include total ATS shares traded, dark pool volume as a percentage of total market volume, and week-over-week change. A rising dark pool share — especially above 15% of total volume — may indicate growing institutional accumulation or distribution that has not yet appeared in public exchange flow.

Question 3

What ATS venues route dark pool orders for OPT?

Accepted Answer

FINRA-registered ATS venues routing OPT dark pool volume include major broker-dealer platforms operated by firms such as Citadel, Virtu, UBS, and others. StonkWhisper tracks which venues handle the most shares and how that distribution shifts week to week — a venue concentration shift can indicate changes in which institution is most active.

Question 4

How often is OPT dark pool data updated?

Accepted Answer

FINRA publishes ATS volume data on a two-week delayed basis. StonkWhisper ingests and processes this data as soon as it becomes available, updating OPT's dark pool page with the latest weekly volume and venue breakdown.

Week	Shares	DP %	WoW
2025-03-17	321	—	-99.2%
2025-03-10	42.2K	—	—

OPT Dark Pool Activity

Weekly History

ATS Venue Breakdown (latest week)