HDFCBANK Gamma Exposure (GEX) | Live GEX Profile
Gamma Exposure (GEX) measures how much HDFCBANK dealers must hedge as the index moves. Positive GEX (long-gamma regime) typically pins the spot and dampens volatility, while negative GEX (short-gamma regime) accelerates moves. Our tool plots GEX per strike with Call Wall and Put Wall levels — the most actionable map of where dealer hedging will support or resist price.
The chart shows Net GEX bars per strike (green above zero where dealers stabilize, red below where they accelerate moves) with the ABS GEX line tracing total hedging concentration. Use the time slider to scrub any minute of the session in both live and historical modes.
Reading the HDFCBANK gamma regime
The single most useful number on the chart is Net GEX. When it is strongly positive,HDFCBANK dealers are net long gamma — their delta-hedging sells rallies and buys dips, so intraday ranges compress and price pins near heavy-gamma strikes. When Net GEX flips negative, the same hedging machinery runs in reverse: dealers chase price, candles widen, and breakouts follow through. The gamma flip level marks where that regime change happens, and the Call Wall and Put Wall bracket the day's dealer-defended range.
Use Gamma Exposure alongside our Open Interest Analysis, Multi-Strike OI Chart, and Max Pain Calculator to build a complete view ofHDFCBANK option-market positioning each trading session.
HDFC Bank Ltd (HDFCBANK) GEX Calculation: From Greeks to Dealer Hedging
The HDFCBANK GEX formula
Per strike, GEX = Spot² × Gamma × Open Interest. Calls add to GEX (dealers assumed long), puts subtract (dealers assumed short). Summing across the HDFC Bank Ltd 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 HDFCBANK 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 HDFCBANK numbers use the same formula expressed in crores.
Why our HDFCBANK 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 14 August 2026
The HDFC Bank Ltd 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 HDFCBANK.
HDFC Bank Ltd (HDFCBANK) Gamma Exposure: How Dealer Hedging Drives Price
What is HDFCBANK Gamma Exposure?
Gamma Exposure (GEX) measures how much option market makers must hedge in HDFC Bank Ltd as the underlying moves. As a NIFTY and BANKNIFTY and FINNIFTY constituent, dealer hedging flows in HDFCBANK 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 HDFCBANK traders
When HDFC Bank Ltd 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 HDFCBANK traders an edge that price alone doesn't.
Reading the HDFCBANK 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 HDFCBANK GEX today
As of 14 August 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 HDFC Bank Ltd is in a pinning regime or a trending one — and where the next supply/demand zones from dealer hedging sit.
HDFC Bank Ltd (HDFCBANK) Call Wall & Put Wall: Hidden Support and Resistance
The HDFCBANK Call Wall
The Call Wall is the strike with the heaviest call-side gamma (max CE Gamma × CE OI) above spot. As a NIFTY and BANKNIFTY and FINNIFTY constituent, HDFCBANK dealers who are short those calls must sell into rallies that approach the wall — pushing price back. That's why the Call Wall acts as a hard ceiling for the day.
The HDFCBANK Put Wall
The Put Wall is the strike with the heaviest put-side gamma below spot. Dealers short those puts buy into dips, creating a floor. HDFC Bank Ltd bounces off the Put Wall throughout calm sessions; only when the wall breaks does the underlying enter free-fall mode.
Migration of walls through the HDFCBANK session
Walls aren't static. As OI rebalances minute by minute, the heaviest gamma strike migrates. A rising Call Wall through the HDFCBANK session signals dealers are stepping back from resistance — bullish. A falling Put Wall signals support is being abandoned — bearish.
Trading the HDFCBANK walls today
As of 14 August 2026, the Call Wall and Put Wall give you two intraday levels with the strongest empirical edge. Fade rallies into the Call Wall, buy dips at the Put Wall, and respect breakouts that decisively pass either wall.
HDFCBANK GEX regimes: quick reference
| Net GEX reading | Dealer positioning | Typical HDFCBANK behaviour |
|---|---|---|
| Strongly positive | Long gamma; sell rallies, buy dips | Tight range, pinning near heavy-gamma strikes; premium selling favoured |
| Mildly positive | Long gamma, thinning | Mean reversion still dominates but walls break more easily |
| Near zero (flip zone) | Transition; hedging direction unstable | Choppy, whipsaw-prone; regime can flip mid-session |
| Mildly negative | Short gamma; buy rallies, sell dips | Ranges expand and breakouts start to follow through |
| Strongly negative | Deep short gamma; hedging chases price | Trending, high-volatility session; directional trades favoured |
These regimes are tendencies from dealer-flow research, not fixed rules — the exact crore thresholds vary with HDFCBANK spot level and expiry proximity. The live chart above recomputes Net GEX, ABS GEX and both walls every minute during market hours, so you can see in real time which regime the session is trading in.
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.
HDFCBANK Gamma Exposure — Frequently Asked Questions
What is HDFCBANK Gamma Exposure (GEX)?
HDFCBANK Gamma Exposure measures how much option dealers must hedge as the underlying moves, computed per strike as Spot² × Gamma × OI with call OI positive and put OI negative (dealer convention). Positive Net GEX means dealers sell rallies and buy dips, dampening HDFCBANK moves; negative Net GEX means their hedging amplifies moves.
What are the HDFCBANK Call Wall and Put Wall?
The Call Wall is the strike above spot with the heaviest call-side gamma — dealers short those calls sell into rallies, making it an intraday ceiling for HDFCBANK. The Put Wall is the heaviest put-gamma strike below spot, where dealer buying creates a floor. Wall migration through the session matters: a rising Call Wall is bullish, a falling Put Wall bearish.
What does negative Net GEX mean for HDFCBANK?
Negative Net GEX puts HDFCBANK in a short-gamma regime: dealers must buy rallies and sell dips, so their hedging amplifies every move. Expect wider intraday ranges, breakouts with follow-through, and faster trending sessions. Short-gamma regimes favour directional and premium-buying strategies, while premium selling works better when Net GEX is positive and price pins.
What is the gamma flip level on the HDFCBANK GEX chart?
The gamma flip is the HDFCBANK price level where aggregate dealer gamma crosses zero. Above it dealers are net long gamma and stabilise price; below it they are net short gamma and accelerate moves. Enable Show Flip on the chart to plot this level — a spot break below the flip often precedes a volatility expansion.
How often does HDFCBANK Gamma Exposure data update?
During NSE market hours (9:15 AM to 3:40 PM IST) the HDFCBANK GEX profile refreshes every minute from live option chain open interest and gamma. The time slider lets you scrub back to any minute of the session, and historical mode replays the full per-strike gamma profile for any past HDFCBANK trading day.