GEX+ Risk Surface — Spot Move × IV Shock
Blue = dealer dampening. Red = dealer amplifying (cascade). Crosshairs = current position. Deep red = spot decline + IV spike creates maximum crash amplification.
DANGER ZONE
Red regions: spot drops + IV spikes. Dealers forced to sell into falling market — vanna amplifies into cascade.
SAFE ZONE
Blue regions: positive GEX+ means dealers absorb moves, buying dips and selling rallies.
TRADING RANGE - NEAR-TERM FORECAST (See FORECAST for details)
1-Day Forecast — March 17: Prob (above) 6650 65.8% | Prob (below) 6750 65.4%
1-Week Forecast — March 23: Prob (above) 6650 57.3% | Prob (below) 6750 55.9%
1-Week Forecast — March 23: Prob (above) 6650 57.3% | Prob (below) 6750 55.9%
The options market prices a 1σ daily move of ±83 points (1.2%) and a 1-week move of ±186 points (2.8%). With −29.4B combined GEX+ and ~50% disagreement across all three months, the amplifying regime distorts the true odds. NPD at -783 — dealers are net short puts, meaning they are not insulated from declines and forced selling is untempered.
In plain language: With NPD at −783, dealers are net short puts — they don’t just amplify declines, they lose money on them. The 6650–6750 range holds on inertia, not on structural support. A break below 6600 activates a vanna cascade with no dealer put cushion to absorb it. The zero-gamma flip at 6964 remains ~265 points overhead — reachable on a squeeze, but vanna resistance makes every point of the rally progressively harder.
In plain language: With NPD at −783, dealers are net short puts — they don’t just amplify declines, they lose money on them. The 6650–6750 range holds on inertia, not on structural support. A break below 6600 activates a vanna cascade with no dealer put cushion to absorb it. The zero-gamma flip at 6964 remains ~265 points overhead — reachable on a squeeze, but vanna resistance makes every point of the rally progressively harder.
SESSION CHANGES — March 13 → March 16
SPX rallied +67 points (6632 → 6699) but the structural picture deteriorated in two critical ways:
NPD collapsed from +616 to −783. Dealers went from net long puts (insulated from declines) to net short puts (hurt by declines). This is the single most important change — the primary safety valve is not just gone, it has inverted. Forced selling now hits a dealer book with negative P&L exposure to the very move it amplifies.
May flipped from dampening to amplifying (+1.3B → −9.5B). The thin mid-term cushion is gone. Both front months now amplify.
June flipped from amplifying to dampening (−31.1B → +7.4B). The back month reversed dramatically, reducing combined GEX+ from −57B to −29B and the blind spot from $74B to $54B.
IV compressed 3.4 points (Apr ATM 23.1% → 19.7%). Skew narrowed from 10.7% to 9.4%. The market repriced risk lower despite worsening dealer positioning — less fuel for vanna cascades but also cheaper optionality for hedgers.
Net read: The headline combined GEX+ improved, but the quality of the positioning worsened. Negative NPD with two amplifying front months is structurally more dangerous than the prior session’s larger GEX+ with positive NPD. The rally bought time but not safety.
NPD collapsed from +616 to −783. Dealers went from net long puts (insulated from declines) to net short puts (hurt by declines). This is the single most important change — the primary safety valve is not just gone, it has inverted. Forced selling now hits a dealer book with negative P&L exposure to the very move it amplifies.
May flipped from dampening to amplifying (+1.3B → −9.5B). The thin mid-term cushion is gone. Both front months now amplify.
June flipped from amplifying to dampening (−31.1B → +7.4B). The back month reversed dramatically, reducing combined GEX+ from −57B to −29B and the blind spot from $74B to $54B.
IV compressed 3.4 points (Apr ATM 23.1% → 19.7%). Skew narrowed from 10.7% to 9.4%. The market repriced risk lower despite worsening dealer positioning — less fuel for vanna cascades but also cheaper optionality for hedgers.
Net read: The headline combined GEX+ improved, but the quality of the positioning worsened. Negative NPD with two amplifying front months is structurally more dangerous than the prior session’s larger GEX+ with positive NPD. The rally bought time but not safety.
GEX+ Profile — Dealer Hedging Pressure vs Spot
Crash Risk — GEX+ at Drawdown Levels
Negative GEX+ at crash levels = dealers amplify the selloff.
nextSignals Directional Index Analysis — SPX 6,699.38 · March 16, 2026
THE CHART
The heatmap reflects April expiry positioning (32 DTE). Current spot (6,699.38) sits in red territory — the amplifying regime. The zero-GEX+ contour lies at +4.0% above spot (SPX 6964), requiring a ~265-point rally to reach dampening.
PRICE, GEX & VEX
April GEX+ at −27.3B is deeply negative. VGR at 14,796× confirms extreme vanna dominance. Naive shows +13.2B — a $41B gap. 49.5% of April contracts disagree with naive.
May carries additional risk at −9.5B. June is the sole dampening month at +7.4B with the largest OI (1.0M). Combined three-month GEX+ of −29.4B vs naive +24.5B = $54B information asymmetry.
May carries additional risk at −9.5B. June is the sole dampening month at +7.4B with the largest OI (1.0M). Combined three-month GEX+ of −29.4B vs naive +24.5B = $54B information asymmetry.
CHARM — TIME DECAY HEDGING PRESSURE
Net charm is +47.8M delta/day across the term structure — modestly supportive. As options lose time value, dealer delta positions shift, forcing daily hedging adjustments independent of spot moves.
April: +41.0M delta/day (32 DTE). Both call charm (+16.9M) and put charm (+24.1M) are positive. Time decay forces dealers to buy ~41M delta per day to stay hedged — a daily bid under the market. This is the largest contributor because near-expiry options decay fastest.
May: +10.8M delta/day (60 DTE). Same supportive direction, weaker magnitude.
June: −4.0M delta/day (94 DTE). Call charm has flipped negative (−14.9M), generating selling pressure. Put charm (+10.9M) partially offsets but June is a net daily seller.
On Charm: Charm provides friction that slows the decay on flat days but cannot prevent it once momentum builds. As April expiry approaches, charm will accelerate (potentially 3–5× current levels at 10 DTE), creating stronger pin risk around high-OI strikes — stickier near key levels, faster when the market breaks away.
April: +41.0M delta/day (32 DTE). Both call charm (+16.9M) and put charm (+24.1M) are positive. Time decay forces dealers to buy ~41M delta per day to stay hedged — a daily bid under the market. This is the largest contributor because near-expiry options decay fastest.
May: +10.8M delta/day (60 DTE). Same supportive direction, weaker magnitude.
June: −4.0M delta/day (94 DTE). Call charm has flipped negative (−14.9M), generating selling pressure. Put charm (+10.9M) partially offsets but June is a net daily seller.
On Charm: Charm provides friction that slows the decay on flat days but cannot prevent it once momentum builds. As April expiry approaches, charm will accelerate (potentially 3–5× current levels at 10 DTE), creating stronger pin risk around high-OI strikes — stickier near key levels, faster when the market breaks away.
MARKET FRAGILITY
Both front months are amplifying. April (−27.3B) and May (−9.5B) are both negative GEX+. June provides the only dampening at +7.4B but with 51.5% disagreement.
NPD at -783 — dealers are net short puts. Dealers no longer hold long put delta. Forced selling hits a book that loses on the decline. This removes the primary safety valve.
Zero-gamma at +4.0% (6964) is ~265 points overhead.
Crash Risk at −5% (SPX 6364.4): GEX+ drops to −13.5B. At −10%: −4.4B.
~50% disagreement across all three months. Apr 49.5%, May 48.6%, Jun 51.5%.
NPD at -783 — dealers are net short puts. Dealers no longer hold long put delta. Forced selling hits a book that loses on the decline. This removes the primary safety valve.
Zero-gamma at +4.0% (6964) is ~265 points overhead.
Crash Risk at −5% (SPX 6364.4): GEX+ drops to −13.5B. At −10%: −4.4B.
~50% disagreement across all three months. Apr 49.5%, May 48.6%, Jun 51.5%.
THE BEAR CASE
1. April at −27.3B is deeply negative as the front month. Every tick lower triggers massive same-direction dealer selling.
2. NPD at -783 means dealers are net short puts. Dealers lose on declines with no P&L insulation. This is the worst positioning for forced selling.
3. May extends amplification through mid-May at −9.5B. Combined Apr+May of ~−37B is continuous amplification for two months.
4. June’s +7.4B may be unreliable with 51.5% disagreement.
Deep front-month amplification combined with negative NPD. Dealers amplify moves and are hurt by them simultaneously — no hedge, no buffer, only exposure.
2. NPD at -783 means dealers are net short puts. Dealers lose on declines with no P&L insulation. This is the worst positioning for forced selling.
3. May extends amplification through mid-May at −9.5B. Combined Apr+May of ~−37B is continuous amplification for two months.
4. June’s +7.4B may be unreliable with 51.5% disagreement.
Deep front-month amplification combined with negative NPD. Dealers amplify moves and are hurt by them simultaneously — no hedge, no buffer, only exposure.
THE BULL CASE
1. Vanna works both ways at 14,796× VGR. A rally with IV compression triggers explosive dealer buying.
2. Zero-gamma at 6964 is reachable — a ~265-point rally flips the regime.
3. June provides +7.4B dampening with 1.0M OI — the largest position in the term structure.
4. IV has compressed to ~19.72% ATM. Lower IV means cheaper optionality and less vanna fuel.
Amplification is severe but IV compression has removed some fuel. The zero-gamma crossing is achievable, and June’s large OI provides potential support.
2. Zero-gamma at 6964 is reachable — a ~265-point rally flips the regime.
3. June provides +7.4B dampening with 1.0M OI — the largest position in the term structure.
4. IV has compressed to ~19.72% ATM. Lower IV means cheaper optionality and less vanna fuel.
Amplification is severe but IV compression has removed some fuel. The zero-gamma crossing is achievable, and June’s large OI provides potential support.
SPX PROBABILITY FORECAST — 6,699.38 · March 16, 2026
Breeden-Litzenberger risk-neutral density · Cornish-Fisher skew/kurtosis adjustment · GEX+ regime conditioning
1-DAY FORECAST — March 17
5th PCTILE
6,567.7
25th PCTILE
6,663.4
MEDIAN
6,700.8
75th PCTILE
6,737.6
95th PCTILE
6,830.4
1σ MOVE
±83 pts
±1.24%
FORWARD
6,700.2
90% RANGE
6,568 – 6,830
| SPX Level | P(below) | P(above) |
|---|---|---|
| 6,450 | 0.0% | 100.0% |
| 6,500 | 0.0% | 100.0% |
| 6,550 | 3.2% | 96.8% |
| 6,600 | 16.3% | 83.7% |
| 6,650 | 34.2% | 65.8% |
| 6,700 | 49.6% | 50.4% |
| 6,750 | 65.4% | 34.6% |
| 6,800 | 83.8% | 16.2% |
| 6,850 | 97.0% | 3.0% |
| 6,900 | 100.0% | 0.0% |
| 6,950 | 100.0% | 0.0% |
1-WEEK FORECAST — March 23
5th PCTILE
6,407.0
25th PCTILE
6,621.1
MEDIAN
6,704.7
75th PCTILE
6,787.1
95th PCTILE
6,994.6
1σ MOVE
±186 pts
±2.77%
FORWARD
6,703.3
90% RANGE
6,407 – 6,995
| SPX Level | P(below) | P(above) |
|---|---|---|
| 6,450 | 12.0% | 88.0% |
| 6,500 | 19.5% | 80.5% |
| 6,550 | 27.6% | 72.4% |
| 6,600 | 35.5% | 64.5% |
| 6,650 | 42.7% | 57.3% |
| 6,700 | 49.3% | 50.7% |
| 6,750 | 55.9% | 44.1% |
| 6,800 | 63.1% | 36.9% |
| 6,850 | 71.1% | 28.9% |
| 6,900 | 79.5% | 20.5% |
| 6,950 | 87.3% | 12.7% |
APRIL EXPIRY DISTRIBUTION — 32 DTE
BL MEAN
6,697.0
-0.04%
BL STD
112.0
1.67%
SKEWNESS
-0.047
KURTOSIS
6.19
Normal = 3.0
| SPX Level | P(below at expiry) | P(above at expiry) |
|---|---|---|
| 6,200 | 0.0% | 100.0% |
| 6,300 | 0.0% | 100.0% |
| 6,400 | 0.0% | 100.0% |
| 6,500 | 3.9% | 96.1% |
| 6,600 | 26.4% | 73.6% |
| 6,700 | 50.3% | 49.7% |
| 6,800 | 75.2% | 24.8% |
| 6,900 | 97.2% | 2.8% |
| 7,000 | 100.0% | 0.0% |
| 7,100 | 100.0% | 0.0% |
GEX+ REGIME CONDITIONING
The probabilities above are risk-neutral — what the market prices, not physical probabilities.
Left tail: Risk-neutral understates physical likelihood. With −29.4B GEX+ and NPD at -783 (dealers net short puts), declines trigger untempered forced selling.
Right tail: Risk-neutral overstates. Vanna resistance suppresses rallies. Zero-gamma at 6964 (+4.0%) acts as ceiling.
Confidence: High for central ±1σ. Moderate for 10th–90th. Low for 5th/95th extremes.
Left tail: Risk-neutral understates physical likelihood. With −29.4B GEX+ and NPD at -783 (dealers net short puts), declines trigger untempered forced selling.
Right tail: Risk-neutral overstates. Vanna resistance suppresses rallies. Zero-gamma at 6964 (+4.0%) acts as ceiling.
Confidence: High for central ±1σ. Moderate for 10th–90th. Low for 5th/95th extremes.
METHODOLOGY
1. Breeden-Litzenberger density extraction from OTM option prices. 2. Moment extraction (mean, std, skew, kurtosis). 3. ATM IV scaling for 1-day/1-week σ = S × IV × √(t/252). 4. Cornish-Fisher expansion for percentiles. 5. GEX+ regime conditioning (qualitative).