SPX put sweeps, IWM breakdown, and Warsh uncertainty push afternoon toward 765

GAMMA BRIEF AI Generated 2026-08-28

Friday's session opened with a bang and faded fast. SPY briefly traded as high as 775.28 before reversing sharply, and as of midday sits at 769.78 — just a hair below the 770 call wall. Small-caps are leading the damage, with IWM down 1.28% and now pressing directly against its put wall at 295.

The story behind the move is hard to ignore: at 9:01 AM, five separate SPX put sweeps totaling over $698 million in premium hit the tape simultaneously — all 0DTE, all bearish bets. Those sweeps preceded a session that has since seen NVDA drop 3.37%, IWM reject its 300 call wall to the tick, and VIX jump 4.16% while Fed Chair Warsh's Jackson Hole remarks added a layer of macro uncertainty. The afternoon setup is not friendly.

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 BEARISH

Call Wall 7750

Put Wall 7700

Max Pain 7750

Net GEX +$13.5B

SPY BEARISH

Call Wall 770

Put Wall 765

Max Pain 760

Net GEX +$1.5B

QQQ BEARISH

Call Wall 720

Put Wall 700

Max Pain 707

Net GEX +$0.9B

IWM BEARISH

Call Wall 300

Put Wall 295

Max Pain 295

Net GEX $3.6B

ⓘ 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: SPX 0DTE put sweeps at 9:01 AM — five strikes (7730/7740/7750/7760/7765), combined premium >$698M, vol/OI ratios ranging from 16.5x to 122.5x, all sentiment: bearish_bet.

→DETERMINISTIC: IWM net GEX: -$3.56B — negative gamma regime; dealer short gamma amplifies directional moves.

→DETERMINISTIC: IWM session high 300.36 — +0.36 above call wall (300.0); current last 295.96, +0.96 above put wall (295.0); max pain at 295.0.

→DETERMINISTIC: SPY trend bias: BEARISH, score -37, confidence 52%; below VWAP 772.29, bearish 5m+15m EMA cross.

→DETERMINISTIC: QQQ trend bias: BEARISH, score -44, confidence 62%; below VWAP 720.20, bearish 5m+15m EMA cross.

→DETERMINISTIC: NYSE A/D ratio 0.69, net -485; VIX +4.16% to 14.77; NVDA -3.37%, GLD -2.82%, SLV -3.82% — broad de-risking.

→DETERMINISTIC: SPY 0DTE volume at 74.3% of total SPY options volume — elevated intraday gamma sensitivity at key strikes.

→SYNTHESIS: IWM negative GEX (-$3.56B) combined with price at 295.96 — just +0.96 above the put wall and max pain (both at 295.0) — creates asymmetric downside amplification risk into the weekly expiry close; positive GEX in SPY ($1.50B) does not apply to IWM, which has no gamma cushion below current levels.

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

Key Themes

$698M SPX 0DTE put sweep cluster at the openIWM call wall rejection and negative GEX amplificationWarsh/Hammack hawkish tilt removes dovish catalystWeekly expiry max pain gravity — SPY 760, IWM 295

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Directional Calls

SPY BEARISH

QQQ BEARISH

IWM BEARISH