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 −2.9B 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 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) to net short puts (exposed). Forced selling now hits a book with negative P&L exposure to the very move it amplifies.
May flipped from dampening to amplifying (+1.3B → −0.9B). Both front months now amplify.
June flipped from amplifying to dampening (−31.1B → +0.7B). The back month reversed, reducing combined GEX+ from −57B to −2.9B.
IV compressed 3.4 points (Apr ATM 23.1% → 19.7%). Skew narrowed from 10.7% to 9.4%.
NPD collapsed from +616 to −783. Dealers went from net long puts (insulated) to net short puts (exposed). Forced selling now hits a book with negative P&L exposure to the very move it amplifies.
May flipped from dampening to amplifying (+1.3B → −0.9B). Both front months now amplify.
June flipped from amplifying to dampening (−31.1B → +0.7B). The back month reversed, reducing combined GEX+ from −57B to −2.9B.
IV compressed 3.4 points (Apr ATM 23.1% → 19.7%). Skew narrowed from 10.7% to 9.4%.
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 −2.7B. GEX at −2M and VEX at −2733M per 1% spot / 1 vol point respectively. VGR at 1,480× confirms vanna dominance — IV changes drive ~1,480× more dealer hedging than equivalent spot moves. Naive shows +1.3B — a $4.1B gap. 49.5% of April contracts disagree with naive.
May carries additional risk at −0.9B. June is the sole dampening month at +0.7B with 1.0M OI. Combined three-month GEX+ of −2.9B vs naive +2.5B = $5.4B information asymmetry.
May carries additional risk at −0.9B. June is the sole dampening month at +0.7B with 1.0M OI. Combined three-month GEX+ of −2.9B vs naive +2.5B = $5.4B information asymmetry.
CHARM — TIME DECAY HEDGING PRESSURE
Net charm is +47.8M delta/day across the term structure — modestly supportive.
April: +41.0M/day (32 DTE). Time decay forces dealers to buy delta daily — a bid under the market.
May: +10.8M/day (60 DTE). Same direction, weaker magnitude.
June: −4.0M/day (94 DTE). Call charm flipped negative; 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/day (32 DTE). Time decay forces dealers to buy delta daily — a bid under the market.
May: +10.8M/day (60 DTE). Same direction, weaker magnitude.
June: −4.0M/day (94 DTE). Call charm flipped negative; 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 (−2.7B) and May (−0.9B) are both negative GEX+. June provides the only dampening at +0.7B but with 51.5% disagreement.
NPD at -783 — dealers are net short puts. Forced selling hits a book that loses on the decline. No safety valve.
Zero-gamma at +4.0% (6964) is ~265 points overhead.
Crash Risk at −5% (SPX 6364.4): GEX+ drops to −1.4B. At −10%: −0.4B.
~50% disagreement across all three months. Apr 49.5%, May 48.6%, Jun 51.5%.
NPD at -783 — dealers are net short puts. Forced selling hits a book that loses on the decline. No safety valve.
Zero-gamma at +4.0% (6964) is ~265 points overhead.
Crash Risk at −5% (SPX 6364.4): GEX+ drops to −1.4B. At −10%: −0.4B.
~50% disagreement across all three months. Apr 49.5%, May 48.6%, Jun 51.5%.
THE BEAR CASE
1. Both front months amplify with combined Apr+May of −3.7B. No near-term dampening.
2. NPD at -783 means dealers are net short puts. They lose on declines with no P&L insulation — worst positioning for forced selling.
3. Crash Risk accelerates steeply. At −5%, GEX+ reaches −1.4B at −5% levels. The drawdown path is convex, not linear.
4. June’s dampening may be unreliable with 51.5% disagreement.
Front-month amplification + negative NPD = dealers amplify and are hurt simultaneously. No hedge, no buffer, only exposure.
2. NPD at -783 means dealers are net short puts. They lose on declines with no P&L insulation — worst positioning for forced selling.
3. Crash Risk accelerates steeply. At −5%, GEX+ reaches −1.4B at −5% levels. The drawdown path is convex, not linear.
4. June’s dampening may be unreliable with 51.5% disagreement.
Front-month amplification + negative NPD = dealers amplify and are hurt simultaneously. No hedge, no buffer, only exposure.
THE BULL CASE
1. VGR of 1,480× amplifies recoveries equally. A rally with IV compression triggers dealer buying.
2. Zero-gamma at 6964 — ~265 points flips the regime.
3. June +0.7B with 1.0M OI provides back-month structural support.
4. IV compressed to ~19.72% ATM. Less vanna fuel, cheaper optionality.
5. Charm at +47.8M/day provides a modest daily bid that accelerates into expiry.
The corrected VGR of 1,480× is still meaningfully vanna-dominant but not the extreme readings previously reported. The zero-gamma crossing is achievable.
2. Zero-gamma at 6964 — ~265 points flips the regime.
3. June +0.7B with 1.0M OI provides back-month structural support.
4. IV compressed to ~19.72% ATM. Less vanna fuel, cheaper optionality.
5. Charm at +47.8M/day provides a modest daily bid that accelerates into expiry.
The corrected VGR of 1,480× is still meaningfully vanna-dominant but not the extreme readings previously reported. The zero-gamma crossing is achievable.
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
BL STD
112.0
SKEWNESS
-0.047
KURTOSIS
6.19
| SPX Level | P(below) | P(above) |
|---|---|---|
| 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
Risk-neutral probabilities. Left tail understated (negative NPD = no buffer). Right tail overstated (vanna resistance at 6964). High confidence for central ±1σ. Moderate 10th–90th. Low for extremes.
METHODOLOGY
1. Breeden-Litzenberger from OTM prices. 2. Moments (mean, std, skew, kurtosis). 3. ATM IV scaling σ = S × IV × √(t/252). 4. Cornish-Fisher percentiles. 5. GEX+ conditioning (qualitative).