XLB Dark Pool Activity
Wednesday, September 9, 2026 · 3-session delayed summary
$113MOff-exchange premium
8Dark pool prints
2.2MShares off-exchange
~$26MLargest single print
State Street Materials Select Sector SPDR ETF (XLB) traded $113M across 8 dark pool prints on Sep 9, about 548% above its recent average. Block-size prints made up roughly 95% of the session, concentrated between $52 and $52.
Key dark pool levels
Block activity
5Block-size prints
$107MCombined block premium
95%Share of off-exchange premium
~$26MLargest block
| Time | Size | Price | Premium | Type |
|---|---|---|---|---|
| █:██ PM | ███,██0 | $█,███.██ | $██.█M | BLOCK |
| █:██ PM | ███,██0 | $█,███.██ | $██.█M | BLOCK |
Off-exchange premium: Sep 2 to Sep 9, 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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