23/09/2026
& Institutional Flow Update | Options & Position Positioning
Overnight option flow continues to reflect aggressive downside hedging alongside persistent upside call accumulation, driving a distinct shift from futures into options exposure.
Key Option Block Activity:
Total Volumes: 7 option blocks executed — 3,709 puts vs. 750 calls (heavy put bias).
Downside Put Activity:
25,000 Strike: 1,400 contracts total (1,000 contracts @ 183.2 with a 54-lot delta hedge; 400 contracts @ 208.0).
25,800 Strike (ATM): 750 contracts @ 455.2 (50% delta hedge / 84-lot).
24,850 Strike: 605 contracts.
22,800 / 24,800 Put Spread: 477 x 477 spread.
Upside Call Activity:
27,000 Call: 750 contracts added @ 36.2 — marking the 3rd consecutive session of institutional accumulation at this strike.
Structure Confirmations:
Monday’s Collar Structure Confirmed New:
Put 22,500 (+1,109)
Call 26,750 (+1,080)
Put 24,750 (+938)
Outright Put 24,600 (+590)
All legs show roughly 100% open interest coverage, fully validating new position creation.
Open Interest & Gamma Metrics:
PCR & OI Structure: Call OI stands at 42,924 vs. Put OI at 87,009 — Put/Call Ratio sits at 2.03.
Key Volatility Levels:
Call Wall: 27,000 (12,095 OI)
Put Wall: 23,500 (7,102 OI)
Max Pain: 26,000 (Unchanged)
Gamma Dynamics:
Net GEX has contracted further to -$75M per 1% move, with the Gamma Flip level slipping to 26,075.
Market Context:
With Dec settling near 25,878 (after a 25,599 – 25,968 range), price action sits just 120 points below Max Pain and 200 points below the Gamma Flip. The short-gamma regime is rapidly approaching its inflection point.
Futures vs. Options Positioning Shift:
Monday added +2,014 contracts of futures OI, while Tuesday shed -2,680 contracts (net -666 contracts across two sessions), even as the index advanced from 25,766 to 25,884.
Concurrently, Oct Open Interest expanded by +5,721 contracts in a single session (rising from 124,212 to 129,933).
Takeaway:
Capital is explicitly rotating out of linear futures exposure and leveraging non-linear options structures to manage risk and target upside.