SPY hugs put wall at 765 as breadth collapses and AMD absorbs $146M in bullish flow

GAMMA BRIEF AI Generated 2026-08-20

The S&P 500 is clinging to its 765 put wall by less than a dollar at midday, with declining stocks outnumbering advancing ones by nearly 2-to-1 on the NYSE. Meanwhile, traders poured over $146 million into AMD call options this morning — a striking divergence between single-stock optimism and broad-market selling pressure that defines today's split tape.

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 7600

Net GEX $24.0B

SPY BEARISH

Call Wall 770

Put Wall 765

Max Pain 760

Net GEX $10.4B

QQQ BEARISH

Call Wall 720

Put Wall 700

Max Pain 707

Net GEX $4.5B

IWM BEARISH

Call Wall 300

Put Wall 295

Max Pain 295

Net GEX $2.3B

ⓘ 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: -$10.43B; call wall 770.0, put wall 765.0, max pain 760.0.

→DETERMINISTIC: SPY last (765.76) is +0.76 above put wall (765.0); session low (765.24) came within +0.24 of put wall.

→DETERMINISTIC: IWM session high (300.04) exceeded call wall (300.0) by +0.04 before reversing; IWM last 297.87 is -1.28% vs prior close.

→DETERMINISTIC: NYSE A/D ratio 0.60 (1012 adv / 1692 decl), net -680 issues; TICK +7; SPY 0DTE volume at 72.8% of total.

→DETERMINISTIC: AMD call sweep — 430 strike, Nov 2026 expiry, $85M premium, vol/OI 39.9x, sentiment: bullish_bet. AMD call block — 450 strike, Oct 2026 expiry, $61M premium, vol/OI 1.0x, sentiment: bullish_bet_or_hedge.

→DETERMINISTIC: VIX 15.83 (+0.32%), VVIX 89.49 (-0.36%); vol regime NORMAL; VVIX declining despite equity weakness.

→SYNTHESIS: IWM failed call-wall test (high 300.04 vs wall 300.0, now reversed to 297.87) coincides with -$2.32B net GEX and put wall/max pain convergence at 295 — structure favors continued downside if broad selling resumes.

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

Key Themes

SPY put wall compression at 765 with 72.8% 0DTE volume amplificationIWM failed call-wall rejection at 300 — weakest index on the sessionAMD $146M bullish UOA diverges from broad index sellingHormuz geopolitical headline unpriced in oil; SLV +2.40% outperforms

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Directional Calls

SPY BEARISH

QQQ BEARISH

IWM BEARISH