SPYM Dark Pool Activity
Tuesday, September 8, 2026 · 3-session delayed summary
$1.9BOff-exchange premium
25Dark pool prints
21.2MShares off-exchange
~$947MLargest single print
State Street SPDR Portfolio S&P 500 ETF (SPYM) traded $1.9B across 25 dark pool prints on Sep 8, about 2137% above its recent average. Block-size prints made up roughly 98% of the session, concentrated between $90 and $90.
Key dark pool levels
Block activity
4Block-size prints
$1.9BCombined block premium
98%Share of off-exchange premium
~$947MLargest block
| Time | Size | Price | Premium | Type |
|---|---|---|---|---|
| █:██ PM | ███,██0 | $█,███.██ | $██.█M | BLOCK |
| █:██ PM | ███,██0 | $█,███.██ | $██.█M | BLOCK |
Off-exchange premium: Sep 1 to Sep 8, 2026
How to read this: dark pools are private venues where institutions execute large trades away from public order books; the prints are reported through FINRA shortly after execution. Prices where unusual volume accumulates often act as support or resistance when revisited. Learn how Robinflow tracks dark pools
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