Weekly expiry morning: SPY gaps down into put wall as Nasdaq crumbles

GAMMA BRIEF AI Generated 2026-10-23

S&P 500 futures spent the overnight session fading hard off their globex highs, with /NQ sitting at the very bottom of its overnight range as Nasdaq names get hit by AI capex anxiety — META and related infrastructure plays dragged the index to its worst day in four months yesterday. SPY is opening with a -0.45% cash gap down to 760.54, parking it essentially on top of the 760 put wall heading into a weekly expiration Friday.

The setup is treacherous: VIX has jumped to 20.22 (+3.11%), NYSE breadth printed an almost nonexistent 48 advancers against 1,151 decliners at the pre-market read, and 0DTE volume is running at 73.6% of SPY's total flow — meaning every tick at the open will be amplified by short-dated gamma. The question for today is whether the 760 put wall holds as support and pins price into expiry, or whether a break lower triggers accelerated downside into the 750s.

Dealer positioning shows a clear regime shift as options market makers adjust hedges across the curve. The put-call skew has compressed significantly, suggesting institutional players are reducing downside protection.

Watch the key level closely at open — it sits exactly at the intersection of the GEX zero line and overnight VWAP. A clean break above opens the path to the call wall; rejection sends us back toward the put wall.

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GEX Walls — Options Positioning

SPX BULLISH

Call Wall 7665

Put Wall 7650

Max Pain 7750

Net GEX $64.4B

SPY BULLISH

Call Wall 770

Put Wall 760

Max Pain 770

Net GEX $14.5B

QQQ CHOP

Call Wall 720

Put Wall 700

Max Pain 727

Net GEX $9.5B

IWM BULLISH

Call Wall 280

Put Wall 270

Max Pain 278

Net GEX $1.2B

ⓘ Trend Bias vs Directional Call

The badge shows momentum bias — where price sits relative to VWAP and moving averages right now. The brief's directional call weighs GEX structure, options flow, and macro signals, and may point the opposite direction when a rally runs into a call wall or flow turns bearish.

GEX walls are a snapshot from brief generation — not a live feed.

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GEX walls are price levels where dealers hedge aggressively. Price tends to gravitate toward Max Pain and stall near walls.

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Unusual Options Activity

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Facts — Draw Your Own Conclusions

→SPY cash open gap: -3.42 pts (-0.45%) — pre-mkt last 760.54 vs prior RTH close 763.96.

→SPY net GEX: -$14.48B — negative gamma regime; dealer hedging amplifies directional moves.

→SPX net GEX: -$64.41B — call wall 7,665, put wall 7,650, max pain 7,750.

→/NQ globex range position: 0% (at low), fading -3.00 across last six bars into open; /ES range position: -20% (near low), fading -4.00 across same window.

→VIX: 20.22 (+3.11%) — elevated regime; VVIX: 107.94 — vol-of-vol elevated, tail repricing active.

→NYSE A/D ratio: 0.04 (48 adv / 1,151 decl), TRIN: 1.64 — distribution-day breadth signature.

→SPY 0DTE volume: 73.6% of total SPY flow — elevated intraday gamma sensitivity at key strikes.

→No unusual options activity above $50M threshold — no identifiable institutional options defense or directional bet detected.

Objective data only. No interpretation. Form your own view.

Key Themes

Nasdaq AI-capex selloff fading futures into openSPY/QQQ put wall proximity on weekly expiry with negative GEXDistribution-day breadth (TRIN 1.64, A/D 0.04)0DTE gamma amplification near key strikes

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Directional Calls

SPY BEARISH

SPX BEARISH

QQQ BEARISH

IWM NEUTRAL