XLI Institutional Summary
Wednesday, September 9, 2026 · 3-session delayed summary
$120MDark pool premium
$1.1MCall premium
−$122.6MNet gamma
1Sweeps
Off-exchange
Dark Pool
$120M across 16 prints. Block-size prints made up ~81% of the session.
View XLI dark pool What is dark pool data?$172
$172
$173
Order flow
Options Flow
$2.2M premium, 49% calls. Buying concentrated at the $180 strike. 1 sweeps, 3 blocks.
View XLI options flow What is options flow?Calls 49%Puts 51%
Dealer positioning
Gamma Exposure
Negative regime, net −$122.6M. Call wall $180 · put wall $170.
View XLI gamma exposure What is GEX?This summary is three sessions old. Watch today live.
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