Nifty 50 (NIFTY) Gamma Exposure: How Dealer Hedging Drives Price
What is NIFTY Gamma Exposure?
Gamma Exposure (GEX) measures how much option market makers must hedge in Nifty 50 as the underlying moves. As a major Broad Market index on NSE, dealer hedging flows in NIFTY are large enough to dominate intraday price action. Positive net GEX means dealers stabilize price (sell rallies, buy dips). Negative net GEX means dealers amplify trends (buy rallies, sell dips).
Why GEX matters for NIFTY traders
When Nifty 50 sits in a positive-GEX regime, intraday ranges compress and breakouts fail — perfect for premium-selling strategies. When net GEX flips negative, expect wider candles and trending moves — better for directional buyers. Watching the GEX bars in real time gives NIFTY traders an edge that price alone doesn't.
Reading the NIFTY Gamma Exposure chart
Green bars above zero are strikes where dealers are net long gamma — they dampen volatility. Red bars below zero are strikes where dealers are net short gamma — they accelerate moves. The blue ABS GEX line traces total hedging concentration. Spikes mark the most actionable strikes.
Using NIFTY GEX today
As of 16 May 2026, open the chart, glance at the Net GEX number, and check the bars near spot. Within five seconds you have a read on whether Nifty 50 is in a pinning regime or a trending one — and where the next supply/demand zones from dealer hedging sit.
Nifty 50 (NIFTY) GEX Calculation: From Greeks to Dealer Hedging
The NIFTY GEX formula
Per strike, GEX = Spot² × Gamma × Open Interest. Calls add to GEX (dealers assumed long), puts subtract (dealers assumed short). Summing across the Nifty 50 option chain yields the aggregate dealer gamma exposure — the size of the rebalancing flow that has to happen for every 1-point spot move.
Why we use Spot² in NIFTY GEX
Gamma is a per-unit-of-spot quantity. Multiplying by spot once converts to delta-per-1-point. Multiplying again converts to delta-per-1-percent move — the standard convention used by SpotGamma, Perfiliev, and most academic literature. Our NIFTY numbers use the same formula expressed in crores.
Why our NIFTY numbers differ from US GEX dashboards
We omit the US 100-contract multiplier and express in Rs ÷ 10⁷ (crores). The formula, sign convention, walls, and regime direction are all identical. Only the absolute magnitudes scale differently. Proportional bar heights and rankings match international tools exactly.
Trusting the math as of 16 May 2026
The Nifty 50 GEX you see today is the same standard formula tested across decades of dealer-flow research. Walls and regime calls translate cleanly to action on NIFTY.
About the Gamma Exposure Chart
Gamma Exposure (GEX) measures how much dealers — the option market makers — must hedge as the underlying moves. Every option position they take on creates a gamma imbalance that has to be neutralised by buying or selling the underlying. When dealer gamma is positive in aggregate, they sell rallies and buy dips, which compresses intraday ranges and pins Nifty near heavy-gamma strikes. When it flips negative, they do the opposite — buying breakouts and selling breakdowns — which amplifies trends.
The chart plots per-strike Net GEX (Spot² × Gamma × OI, signed by call/put) as bars. Green bars above zero are strikes where dealers stabilise; red bars below are strikes where they accelerate moves. The ABS GEX line overlays total hedging concentration — spikes mark where the largest delta-rebalancing flows live.
Call Wall and Put Wall
The Call Wall is the strike above spot with the heaviest call-side gamma — dealers short those calls must sell into rallies that approach it, making it a hard intraday ceiling. The Put Wall is the mirror image below spot: dealers short those puts buy into dips, creating a floor. Watching the migration of these levels through the session reveals more than spot price alone — a rising Call Wall is bullish, a falling Put Wall is bearish.
Combine the Gamma Exposure chart with our Open Interest, Multi-Strike OI, and Max Pain tools for the full picture of where dealer hedging will support or resist price.
Frequently Asked Questions
What is Gamma Exposure (GEX)?
Gamma Exposure measures how much dealers (option market makers) must hedge as the underlying moves. Per strike, GEX = Spot² × Gamma × OI. Positive GEX means dealers are net long gamma — they sell rallies and buy dips, which dampens volatility and pins the spot. Negative GEX means dealers are short gamma — they buy rallies and sell dips, which amplifies trends.
What does the Net GEX value tell me?
Net GEX is the signed sum across all strikes: Σ(CE GEX − PE GEX). A positive number means the call side of dealer hedging dominates — expect mean reversion and tighter ranges. A negative number means the put side dominates — expect trending moves and wider ranges. The Nifty Net GEX usually stays positive during calm regimes and flips negative ahead of sharp moves.
What does ABS GEX tell me?
ABS GEX is the sum of |CE GEX| + |PE GEX| across all strikes — total dealer hedging concentration regardless of side. High ABS GEX means a lot of gamma is in play; small spot moves trigger large hedging flows. Low ABS GEX means dealers can let the underlying drift without rebalancing.
What is the Call Wall?
The Call Wall is the strike with the heaviest call-side gamma exposure (max CE Gamma × CE OI) above spot. It typically acts as an upside ceiling because dealers who are short those calls have to sell into rallies that approach the wall, pushing price back. A rising Call Wall through the session is a bullish signal — dealers are stepping back from resistance.
What is the Put Wall?
The Put Wall is the strike with the heaviest put-side gamma exposure (max PE Gamma × PE OI) below spot. It tends to act as a downside floor because dealers short those puts buy into dips toward it. A falling Put Wall through the session is a bearish signal — dealers are abandoning support.
Why are my GEX numbers different from SpotGamma or US GEX dashboards?
We express GEX in crores (Rs ÷ 10⁷) and skip the US 100-contract multiplier. The formula and sign convention are the same as SpotGamma/Perfiliev; only the absolute magnitudes differ by a constant. Walls, regime direction, and proportional bar heights are identical to international tools.
How does the strike-range filter work?
Choose All to see every strike in the option chain. 5 / 10 / 20 narrows the chart to ATM ± N strikes — useful for focusing on the active zone. The KPIs (Net GEX, ABS GEX, Call Wall, Put Wall) always compute on the full strike list regardless of the visible range, so filtering never distorts the headline numbers.
Why does Gamma Exposure look like zero on expiry day at close?
At expiry close, options have no time value left — IV → 0 and gamma → 0 in the Black-Scholes formula. The data correctly reads zero. Use the time slider to scrub back to mid-session (e.g. 14:00) to see meaningful gamma before settlement.
Live vs historical mode — what's the difference?
Live mode pulls the latest minute snapshot and auto-refreshes via a countdown. Historical mode lets you pick any past trading date and replay that day's gamma exposure minute-by-minute via the time slider. Same chart, same metrics, different data source.
How to read the Gamma Exposure chart
- Check the regime (Net GEX sign) — Positive Net GEX = long-gamma regime (pinning/mean-reversion). Negative = short-gamma regime (trending). The colour of the Net GEX number tells you immediately.
- Identify the Call Wall and Put Wall — Toggle Show Walls in settings. Call Wall is the upside ceiling, Put Wall is the downside floor. Spot tends to oscillate between them on positive-GEX sessions.
- Read the per-strike bars — Green bars above zero are strikes where dealers stabilize price (positive Net GEX). Red bars below zero are strikes where dealers amplify moves.
- Use the ABS GEX line — The blue overlay traces total gamma concentration. Spikes mark the most actionable strikes — where dealer hedging flows are largest.
- Scrub the time slider for context — Drag the slider backward to see how walls migrated through the day. A rising Call Wall + rising spot = sustained bullish bias. A falling Put Wall + falling spot = breakdown risk.