This report maps the SPY dealer levels for March 30 - April 3: where hedging should dampen moves, where it may accelerate them, and which strikes matter most.
This Week in One View
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640 is the pivot. It is both the aggregate gamma wall and the put wall, with 385k put OI stacked there. SPY is starting the week 6 points below it at 634. That means the market opens in the acceleration zone, not the dampening zone.
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630 is the first real floor. It is the quarterly put wall and the next major OI cluster below 640. If 640 fails as a recovery level, 630 is the line that should attract institutional defense.
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660 is the first real ceiling. That is the near-term call wall, with 31k OI. It is also close to max pain at 660, which means a 26-point rally would be needed to reach it.
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The entire chain is negative gamma. Every bucket (near, monthly, quarterly) is in a negative regime. There is no positive gamma floor anywhere. Breaks should extend, not fade.
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VIX matters more than price this week. A 1% VIX move creates roughly 7x more dealer hedging flow than a 1% SPY move. A VIX drop from 31 toward 27 would force dealers to unwind put hedges, creating mechanical buying. A VIX spike toward 35+ would force the opposite. Watch VIX, not just spot.
What Changed Since Last Sunday
- SPY dropped 14 points from 649 to 634. The entire structure migrated lower.
- The put wall plunged from 660 to 640. A 20-point collapse in where dealers are defending.
- Near-term P/C ratio jumped from 1.6 to 2.5. The front end is significantly more defensive.
- Aggregate P/C ratio hit 3.1. Extreme put-heavy positioning across the chain.
- IV backwardation deepened. Near-term IV is 41% versus far-term at 24%. Front-end stress is elevated.
- VIX moved from 24 to 31 and the VIX/VIX3M ratio crossed above 1.0 into backwardation.
The structure did not just shift lower. It shifted into a more stressed regime. This is no longer a "negative gamma but healing" setup. This is full negative gamma with elevated vanna risk.
Dealer Map
Key Price Levels
Support and resistance from dealer positioning (spot: 634.09)
The map is simple but tilted. 640 is the switch zone and SPY starts below it. 630 is the first floor. 660 is the first ceiling. Below 630, the next support is 620 and then 585 where a massive quarterly put OI cluster sits with 122k contracts. Above 640, the tape can grind toward 650 and 660, but upside moves should be slow and sticky.
Weekly Chain Bars
Five trading expiries for the week, split into calls and puts, with spot, max pain, and wall levels overlaid.
Near-Term Structure
Near-term (0-2w)
1,958 contracts · 9 expiries · DTE 1-12Open Interest by Strike
Put OI extends left, Call OI extends right
OI by Expiration
How open interest is distributed across expiry dates
The near-term chain is distributed across multiple expiries. April 17 holds 25% of total OI, making it the heaviest single date. March 31 (Tuesday) holds 14% and April 2 (Thursday) holds 13%. Both of those are this week and carry moderate rolloff risk.
Quarter-end rebalancing on Monday-Tuesday adds a structural flow layer on top of the options mechanics. Dealers will be managing both gamma hedging and rebalance flows simultaneously.
What the Chain Is Saying
- Base range:
630-650 - Wider support/resistance:
620-660 - Primary character: full negative gamma, vanna-dominant, fragile support regime
| Strike | GEX | Magnitude | Interpretation |
|---|---|---|---|
| 640 | -208.0M | +0.9% above spot, resistance (call gamma) | |
| 625 | -149.1M | -1.4% below spot, support (put gamma) | |
| 645 | -103.4M | +1.7% above spot, resistance (call gamma) | |
| 630 | -88.5M | -0.6% below spot, support (put gamma) | |
| 650 | -61.7M | +2.5% above spot, resistance (call gamma) |
Volume Flow
Strikes where the most contracts changed hands
The most active strikes are clustered around the immediate battlefield. The 640 put wall is the anchor, with heavy activity at 630, 650, and 660. Call-side activity at 670, 680, 685, and 690 is elevated. These are classified as spread legs (vertical spread positioning) rather than outright directional bets, which suggests hedging activity rather than pure bullish conviction.
Dealer Flow Regime
This week introduces three new dealer flow signals:
Vanna Exposure (VEX): Net VEX is positive. Right now, a 1% VIX move creates about 7x more dealer hedging flow than a 1% price move. That means a VIX decline forces dealers to unwind put hedges (mechanical buying), while a VIX spike amplifies selling. The "vanna rally" setup is live if VIX drops.
Dealer Delta (DEX): The GEX/DEX regime is -GEX / +DEX, which means amplification with dealers still long delta. This is the "fragile support" regime. Support holds until it breaks, then the unwind is violent.
25-Delta Skew: At +6.8pp, skew is elevated. Puts carry meaningful premium over calls. The market is pricing in downside risk but not at extreme levels.
VIX and Volatility Context
VIX closed at 31.1 with VIX3M at 29.3. The term structure is in backwardation (ratio 1.06), so near-term fear exceeds medium-term. The VRP (volatility risk premium) is +16pp, meaning options are significantly overpriced relative to 20-day realized vol of 14.9%. That creates a tug-of-war: implied is rich, but the market is pricing for a move that has not fully materialized yet.
Monthly and Quarterly Backdrop
Monthly (2-6w)
986 contracts · 5 expiries · DTE 19-40Quarterly (6-13w)
656 contracts · 4 expiries · DTE 47-93Monthly positioning is heavily bearish with a P/C ratio of 4.2, centered on the April 17 expiry. The monthly gamma wall sits at 640, same as near-term. Quarterly positioning keeps 630 as the institutional floor, with the quarterly call wall at 680.
The higher-timeframe chain confirms the bearish lean. There is no bullish reset at any horizon.
Scenario Map
- Bull case: VIX drops toward 27-28, triggering a vanna rally. SPY reclaims 640 and holds above it. That opens 650 first and 660 second. Requires either de-escalation in Iran/oil or a dovish Fed signal.
- Base case: SPY oscillates between 630 and 650, with gravity around the 634-640 zone. Quarter-end flows add chop on Monday-Tuesday. VIX stays elevated in the 28-33 range.
- Bear case: VIX spikes above 33 and 630 fails on a closing basis. The vanna-dominant regime amplifies the move. That exposes 620 quickly, then 585 where the massive quarterly put cluster sits.
Tug-of-War Zones
Tug-of-War Zones
Strikes with significant put and call OI — balance shows how evenly split
The key tug-of-war zones are above spot: 650, 660, 670, and 680-690. That confirms upside moves will be contested. Below spot, the structure is thinner. Once 630 breaks, there is less natural friction until the 585-590 put cluster.
Invalidation
The bearish case loses force if VIX drops below 28 and SPY reclaims 640 on a closing basis. The base range call loses force if 630 breaks decisively and the quarterly put wall starts to engage. Those are the two levels that force a full re-map.
Bottom Line
This week's options chain is best described as bearish with fragile support. SPY starts at 634, below the 640 pivot, in full negative gamma across every horizon. The vanna analysis confirms VIX is the primary driver this week. A 1% VIX move creates roughly 7x more dealer hedging than a 1% price move. Watch VIX above all else. 630 is the floor. 660 is the ceiling. Quarter-end rebalancing adds a wildcard on Monday-Tuesday. The structure is set up for acceleration, not mean reversion.
Data note: Primary options-chain and positioning data is sourced from Massive. VIX data from yfinance (Friday close). Cross-asset data from yfinance. BSM parameters: r=3.6% (^IRX), q=1.1% (SPY yield).