🗓️ Last Updated: 21 Apr 2026
Ardan Kumar | AKTV | Options Trading | 12 minutes read
Read in Hindi: गामा ब्लास्ट क्या है?
Table of Contents
Imagine an option premium sitting at just ₹11. And within the next few minutes it moves from ₹11 straight to ₹110.
This is not magic. This is not luck. This is pure science; and that science has a name: Gamma Blast.
Gamma Blast happens on almost every expiry day. But the truth is that 90% of traders who attempt the so-called hero-zero trade on expiry day have absolutely no idea what Gamma Blast actually is. They trade blindly; gambling with no understanding of the mechanics. That is why they lose money repeatedly.
After reading this article you will not make that mistake.
Why Do Most Traders Lose Money on Expiry Day?
The Indian market now has multiple weekly expiries. This has attracted a large number of retail traders with small capital ₹5,000, ₹15,000, ₹25,000; who think expiry day is an opportunity to double or triple their money quickly.
They start hunting for the perfect zero-to-hero trade. They think: “If this ₹1 option can reach ₹100 today, I will be set.” It sounds fantastic. And occasionally it does happen.
But the reality is that out of all the traders chasing this dream on any given expiry day, only a tiny handful book a profit. The vast majority lose their entire capital in a single session.
Why? Because for someone who does not understand the science behind premium movement, expiry day trading is nothing more than gambling. Full stop.
Today we solve that mystery.
Understand Delta: The Engine of Option Premium
To understand why option premiums move the way they do, we need to understand Option Greeks. Let us start with Delta.
Say Nifty is trading around 24,000. The Call option at this same strike price has a Delta of 0.5.
Now if Nifty moves up 100 points to 24,100; how much will our premium increase?
The formula is straightforward:
Premium Change = Market Movement × Delta Value
So: 100 × 0.5 = 50 points
Our option premium will increase by 50 points.
How Delta looks across different option types:
| Option Type | Delta Range |
|---|---|
| Out of the Money (OTM) | 0 to 0.5 |
| At the Money (ATM) | Around 0.5 |
| In the Money (ITM) | 0.5 to 1 |
Call options always have a positive Delta. Put options work in reverse with a negative Delta.
Now the critical question: does Delta stay fixed forever?
No. Delta keeps changing. And that is exactly why we need to understand Gamma.
Gamma: The Accelerator of Delta
Gamma is the Greek that tells us how quickly Delta will change.
Gamma = Rate of Change of Delta
Here is an example:
- Nifty price: 24,000
- Call option Delta: 0.5
- Gamma: 0.008
Now if Nifty moves up 100 points:
Gamma effect = 100 × 0.008 = 0.08
New Delta = 0.5 + 0.08 = 0.58
Delta increased; so our option premium will now grow at a faster rate than before.
You do not need to run these calculations during live trading. Just understand one simple graph:
- When option is Out of the Money: Gamma is low
- When option is At the Money: Gamma is at its maximum
- When option is Deep In the Money: Gamma drops back down again
In simple terms: as price approaches ATM, Gamma rises. As Gamma rises, Delta rises. As Delta rises, the option premium shoots up like a rocket.
This is what we call a Gamma Blast.
Why Does Gamma Blast Happen More Intensely on Expiry Day?
On expiry day the Gamma curve looks completely different from a regular trading day. This is the crucial insight most traders miss.
Here is a real scenario. Imagine it is expiry day and the time is 2:00 PM. Nifty is trading around 23,900. We are watching the 24,000 Call option. Because Nifty is below 24,000 this option is currently Out of the Money. Its premium is bouncing between ₹5 and ₹10.
Now Nifty starts creeping up. 23,950… 23,970… 23,990…
As price moves toward 24,000; Delta is rising, Gamma is rising with it.
Then Nifty touches 24,000. This is where the Gamma Blast happens.
The moment the option reaches ATM; and ATM options have the highest Gamma of all; Gamma shoots up suddenly and sharply. Gamma rises so Delta rises. Delta rises so premium rises. In just 2 to 4 minutes:
- ₹10 premium → ₹100
- ₹5 premium → ₹50
- ₹1 premium → ₹20
This is the moment that makes people go crazy. This is the real magic of the zero-to-hero trade.
What Happens After the Gamma Blast?
The story does not end there.
The moment Nifty moves past 24,000, our option starts going In the Money. And the instant it becomes ITM; Gamma starts declining.
When Gamma drops; premium drops sharply too. That candle which spiked aggressively upward will develop a very long upper wick; because Delta is still there but the Gamma boost is now gone.
The result: any trader who entered on that spike takes a heavy loss as premium collapses right after the blast.
This is the single most important thing to understand about Gamma Blast. When the premium spikes during a Gamma Blast and you enter at the top of that spike; Gamma’s effect is already fading and premium will drop hard immediately after. That entry is the biggest mistake traders make on expiry day.
How to Trade Gamma Blast Correctly
Rule 1: Never enter on an already-spiked premium
When Gamma Blast occurs and premium rockets up; do not enter at that moment. Wait for Gamma’s effect to fade slightly and premium to normalize. Enter after the normalization.
This single discipline is what separates a smart trader from an emotional one.
Rule 2: Identify and position for Gamma Blast in advance
Say it is 1:00 PM on expiry day. Your analysis says Nifty is likely to break above 24,000. Nifty is currently at 23,950.
What do you do? You buy the 24,050 Call option; 50 points above ATM.
This option is currently slightly OTM. Its premium is low. Less capital required. Less risk. Gamma is low right now.
But as soon as Nifty approaches 24,050; this option will be near ATM. Gamma will rise. Delta will rise. Premium will jump sharply.
By positioning before the Gamma Blast rather than chasing it; you capture the move from the right side.
Rule 3: Never buy deep OTM options
Options with very low premiums, deeply Out of the Money, should never be bought on expiry day. They have almost nothing left but Theta decay. If the market goes sideways for even a short time; their premium goes to zero and your capital goes with it.
Rule 4: Never put your full capital into one trade
Win rate on hero-zero trades is low. Always remember this.
If your total capital is ₹1 lakh; put only ₹5,000 to ₹7,000 into this trade. Never your full capital. Not in any single trade; and especially not in a Gamma Blast setup.
Summary: What Did We Learn Today?
| Concept | What It Tells You |
|---|---|
| Delta | How much the option premium will change |
| Gamma | How quickly Delta will change |
| Gamma Blast | When ATM Gamma is at maximum and premium rockets in minutes |
Three golden rules for Gamma Blast trading:
- Never enter on an already-spiked premium; always wait for normalization
- Never buy deep OTM options; Theta will destroy them
- Never risk more than 5 to 7% of capital on a single hero-zero trade
How AKTV Sniper Helps
Before taking any Gamma Blast trade; you need to confirm that the market has a clear directional bias. A flat or choppy market on expiry day will destroy ATM premiums through Theta decay before any Gamma Blast can occur.
AKTV Sniper tracks Opening Range Breakout on NIFTY and SENSEX with VIX filter and EMA alignment in real time. If the OR breakout has confirmed and VIX is below 19; that gives you the directional confirmation you need before positioning for a Gamma Blast setup.
If the market is ranging and no OR breakout has occurred; do not take the trade. Patience on expiry day is always more profitable than action.
Watch a complete video on this: Click Here
Read in Hindi: गामा ब्लास्ट क्या है?
Also read: How to Trade Nifty and SENSEX Options Like a Sniper
Also read: Risk Management in Trading: Why New Traders Lose All Their Capital
Also read: The 5 Stages of a Trader
Disclaimer: This article is for educational purposes only. AKTV is not registered with SEBI. Nothing here constitutes investment advice. Options trading involves substantial risk of loss.
Written by: Ardan Kumar | Founder | aktv.in
FAQs
What is Gamma Blast in options trading?
Gamma Blast is when an option reaches At the Money on expiry day and Gamma hits its maximum value. This causes Delta to rise sharply and the option premium can multiply 10 to 20 times within minutes.
When does Gamma Blast occur?
Gamma Blast occurs on every expiry day. NIFTY expires every Tuesday and SENSEX expires every Thursday.
Which strike should I buy for a Gamma Blast trade?
Buy a strike slightly OTM; around 50 points above current price for a Call. Never buy deep OTM options as Theta decay will destroy their premium before any Gamma Blast occurs.
How much capital should I risk in a Gamma Blast trade?
Maximum 5 to 7% of your total capital. If your capital is ₹1 lakh put only ₹5,000 to ₹7,000 in this trade. Never risk your full capital on a single hero-zero setup.
Why should I not enter on a spiked premium during Gamma Blast?
When premium spikes during a Gamma Blast the Gamma effect is already at its peak and about to fade. Entering at the spike means you buy at the top and premium drops hard immediately after as Gamma declines.
About the Author
Ardan Kumar
Ardan Kumar is the founder of AKTV, a free trading education platform for Indian retail traders. He served 8 years in the Indian Air Force as an Aircraft Maintenance Engineer, working on Mi-17 helicopters and earning special service medals for Operation Rhino in the Mizo and Naga Hills. After leaving the Force, he entered the stock market, learned trading the hard way, and built AKTV to teach others what took him years to figure out. He holds an MBA in Marketing and Finance from CRSU Jind where he topped the course, and has cleared UGC-NET in Management. He is also the co-founder of One Percent Capital LLC, Texas, USA. His YouTube channel AKTV Business has over 27,000 subscribers. Everything on AKTV is free: no login, no payment, no hidden charges.