OpEx Pin Dominates: SPY Trapped at 765–770 While IWM Hugs 300 Call Wall

GAMMA BRIEF AI Generated 2026-08-21

This morning's bearish calls haven't paid off — SPY is trading near session highs at 766.49, IWM is glued to its 300 call wall, and NYSE breadth is running 1,696 advancers against 1,027 decliners. The bears had a thesis; the tape had other plans.

With monthly options expiration in force and 76% of SPY volume coming from 0DTE contracts, the gravitational pull of key strikes is extreme. SPY sits sandwiched between a put wall at 765 and a call wall at 770, and that range may well define the afternoon. The real action today has been in TSLA, where over $450 million in 0DTE call flow hit at the open — and the stock is up 5.27%.

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 7700

Put Wall 7650

Max Pain 7600

Net GEX $35.9B

SPY BULLISH

Call Wall 770

Put Wall 765

Max Pain 757

Net GEX $0.9B

QQQ BULLISH

Call Wall 715

Put Wall 710

Max Pain 705

Net GEX $0.7B

IWM BULLISH

Call Wall 300

Put Wall 295

Max Pain 295

Net GEX $1.0B

ⓘ 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.

Stock GEX — Extended

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Unusual Options Activity

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Facts — Draw Your Own Conclusions

→DETERMINISTIC: SPY net GEX: -$0.95B; call wall 770, put wall 765, max pain 757 — negative gamma regime, OpEx active.

→DETERMINISTIC: SPY last 766.49 is +1.49 above the put wall (765) and -3.51 below the call wall (770); session traded within that corridor all day.

→DETERMINISTIC: IWM trend bias score 54, confidence 77% — drivers: above VWAP 299.18, 5m+15m EMAs bullishly aligned, HH/HL price structure.

→DETERMINISTIC: IWM session high 300.01 exceeded call wall (300.0) by +0.01; last print 299.77 is -0.23 below call wall.

→DETERMINISTIC: TSLA 0DTE call sweeps at 09:30–09:35: four prints totaling ~$450M premium, vol/OI up to 13.1x, all flagged bullish_bet — TSLA last 363.31, +5.27% on session.

→DETERMINISTIC: NYSE A/D 1,696/1,027 (ratio 1.65), TRIN 0.25 — broad buying pressure, low seller urgency.

→DETERMINISTIC: SPY 0DTE volume at 76% of total — elevated pin risk near 765 and 770 strikes.

→SYNTHESIS: GLD +1.90% and SPY +0.51% rising simultaneously (cross-asset signal flagged) while VIX is flat at 15.31 — suggests macro/dollar-driven bid rather than pure equity risk-on, muting confidence in a clean SPY breakout above 770.

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

Key Themes

OpEx pin — SPY pinned 765–770 call/put wall corridorIWM 300 call wall — repeated test, highest-conviction level into closeTSLA 0DTE sweep ($450M+) — directional bet paid, stock +5.27%GLD/SPY co-bid — macro dollar/inflation narrative diverging from pure risk-on

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