Broad selloff deepens for third session; 0DTE bearish sweeps dominated open

GAMMA BRIEF AI Generated 2026-08-18

Tuesday's session offered no relief for bulls as SPY, QQQ, and IWM all closed in the red for a third consecutive day. What stood out: three separate SPX put sweeps totaling $427M in premium hit the tape within the first two minutes of the session, all classified as bearish bets — and price obliged, with QQQ falling as much as -1.70% from the prior close.

The damage was uneven. QQQ bore the brunt, closing at 717.44 while AAPL bucked the trend with a +1.37% gain to 309.79. Net GEX across SPX, SPY, QQQ, and IWM is firmly negative — the structure that amplifies directional moves rather than dampens them — and with VIX ticking up to 15.84, the market is telling you that Wednesday's FOMC Minutes release could be the next catalyst to watch.

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.

Full analysis is for subscribers

Start Free Trial View pricing →

GEX Walls — Options Positioning

SPX BEARISH

Call Wall 7700

Put Wall 7650

Max Pain 7600

Net GEX $50.4B

SPY BEARISH

Call Wall 775

Put Wall 765

Max Pain 760

Net GEX $7.5B

QQQ BEARISH

Call Wall 730

Put Wall 700

Max Pain 710

Net GEX $3.2B

IWM BEARISH

Call Wall 305

Put Wall 295

Max Pain 295

Net GEX $1.5B

ⓘ 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.

Got it, don't show again

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

Stock GEX — Extended

🔒

GEX walls for NVDA, TSLA, AAPL, MSFT, AMZN — Pro subscribers

Upgrade to Pro →

Unusual Options Activity

🔒

Unusual flow analysis for subscribers

Start free trial →

Facts — Draw Your Own Conclusions

→SPY net GEX: -$7.53B — negative gamma regime; dealers amplify directional moves.

→SPX 0DTE put sweeps at 09:02 ET: three sweeps at 7700/7705/7710 strikes, combined $427M premium, vol/OI ratios of 55.7x, 78.9x, and 21.1x — all classified bearish_bet.

→SPY trend bias: BEARISH, score -48, confidence 68% — below VWAP (767.79), Bear EMA 9/21 on 5m+15m, LH/LL price structure.

→QQQ trend bias: BEARISH, score -47, confidence 67% — below VWAP (718.06), Bear EMA 9/21 on 5m+15m, LH/LL price structure.

→IWM trend bias: BEARISH, score -50, confidence 71% — below VWAP (300.65), Bear EMA 9/21 on 5m+15m, LH/LL price structure.

→VIX: 15.84 (+1.15%) — normal regime but rising on a broadly down tape.

→AAPL +1.37% to 309.79 vs QQQ -1.70% to 717.44 — notable single-stock divergence within tech complex today.

→Synthesis: 0DTE bearish sweeps ($427M, extreme vol/OI) arrived at 09:02 ET and aligned with negative GEX across all major ETFs (-$7.53B SPY, -$3.16B QQQ) — flow and structure reinforced each other, with price closing near session lows confirming the signal.

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

Key Themes

0DTE bearish sweep cluster at openNegative GEX amplification regime across all major ETFsThird consecutive down session — distribution arcFOMC Minutes binary catalyst Wednesday

Join the GammaBrief Community

Trade ideas, live flow alerts, and member discussion.

Join Discord →

Directional Calls

SPY BEARISH

QQQ BEARISH

IWM BEARISH