Options Education · Intermediate

How to Choose the Right Strike Price in Nifty Options

Most traders who lose money on Nifty options were not wrong about direction. They were wrong about the strike. You can buy the right call, watch Nifty rally 200 points in your direction, and still lose money because you picked a strike that was too far out of the money or too close to expiry. Strike selection is where the actual edge in options trading lives. This article explains how to pick the right Nifty strike for every market situation, using Delta, implied volatility, and the option chain, so you stop leaving money on the table with the wrong contract.

What Is a Strike Price and Why Does It Matter So Much

The strike price is the specific Nifty level at which your option contract has a right to buy or sell. When you buy a Nifty 24,500 CE (Call option), you are buying the right to profit from Nifty trading above 24,500 before the expiry date. If Nifty never crosses 24,500 before your option expires, that option expires worthless and you lose your entire premium.

The strike price is fixed at the moment you buy the contract. It does not change with Nifty. What changes is the premium, which rises as Nifty moves toward and beyond your strike, and falls as time passes or as Nifty moves away from it. This is why two traders can both correctly predict that Nifty will go up, buy Nifty call options on the same day, and one profits while the other loses, purely because of the strike they chose.

On the NSE, Nifty option strike prices are spaced every 50 points. So you will see contracts at 24,300, 24,350, 24,400, 24,450, 24,500 and so on. The choice between these 50-point increments is not arbitrary. Each one represents a fundamentally different trade with a different risk profile, cost, probability, and breakeven level.

ITM, ATM, OTM: The Foundation of Strike Selection

Every Nifty option strike falls into one of three categories relative to where Nifty is currently trading. These categories determine the option's premium, its responsiveness to Nifty's moves, and what you need from the market to make money.

At the Money (ATM)

The ATM strike is the one closest to where Nifty is trading right now. If Nifty is at 24,376, the ATM call is the 24,400 CE and the ATM put is the 24,350 PE. The ATM option has no intrinsic value, meaning Nifty would not be profitable to exercise right now. Its entire premium is made up of time value and volatility expectation. ATM options are the most expensive in terms of absolute premium but the most responsive to every point Nifty moves. A delta of approximately 0.50 means the ATM call gains roughly Rs 0.50 in premium for every one-point Nifty rise.

In the Money (ITM)

For a call option, ITM means the strike is below the current Nifty level. A 24,000 CE when Nifty is at 24,376 is ITM because the right to buy at 24,000 already has value since Nifty is higher. For a put option, ITM means the strike is above current Nifty. ITM options are more expensive than ATM options because they already contain intrinsic value. Their delta is above 0.60 and can reach close to 1.00 for deep ITM options. This means they move almost rupee for rupee with Nifty, like a futures contract but with your loss capped at the premium paid.

Out of the Money (OTM)

For a call option, OTM means the strike is above the current Nifty level. A 25,000 CE when Nifty is at 24,376 is OTM because Nifty needs to rise by more than 600 points before this option gains any intrinsic value. OTM options are cheap in absolute terms, which is their appeal. But their delta is low, between 0.05 and 0.30, meaning they respond weakly to Nifty moves. A 100-point Nifty rally might only add Rs 10 to Rs 30 to an OTM option's premium while theta simultaneously takes value away every single day.

Using Delta as Your Strike Selection Guide

Delta is the most practical tool for choosing a strike because it directly answers the question: how much money will I make per point Nifty moves? A strike with a delta of 0.50 earns you Rs 0.50 per unit per Nifty point, or Rs 32.50 per lot (0.50 x 65) per Nifty point. A strike with a delta of 0.10 earns only Rs 6.50 per lot per Nifty point. At Nifty lot size 65, the difference between strikes is significant in rupees.

Delta ranges and what they mean in practice

Rs per lot figures based on Nifty lot size of 65 units (effective January 2026) and approximate delta values. Actual delta changes as Nifty moves. All figures are illustrative only.

The practical takeaway: for most directional trades where you expect a 100 to 200-point Nifty move, buy options with a delta between 0.40 and 0.60. This gives you enough sensitivity to Nifty's movement to make money on a moderate move, while the premium cost is reasonable relative to the potential gain.

Delta also doubles as a rough probability indicator. A delta of 0.50 means roughly a 50% chance the option finishes in the money at expiry. A delta of 0.20 means roughly a 20% chance. This is why deep OTM options are statistically poor trades for most situations: you are paying for a 10 to 20% probability event and depending on a lottery-ticket outcome to profit.

Always Calculate Your Breakeven Before Choosing a Strike

Before committing to any strike, calculate the exact Nifty level your option needs to reach before you start making money at expiry. This is called the breakeven point, and it is the most underused filter in strike selection.

The formula is simple:

Call option breakeven = Strike Price + Premium paid
Put option breakeven = Strike Price - Premium paid

Let us run through a concrete example with Nifty at 24,376.

Figures are approximate and for illustration only. Actual premiums vary with market conditions, IV, and time to expiry. Lot size 65, effective January 2026.

The table reveals the core trade-off clearly. The deep OTM 25,000 CE costs only Rs 1,170 per lot. But Nifty needs to rally 642 points from its current level just for you to break even at expiry. In a single weekly cycle, a 642-point rally is an exceptional event. Most weeks, that trade expires worthless. The ATM 24,400 CE costs more at Rs 10,725 per lot but only needs a 189-point rally to break even, which is far more achievable in a normal bullish week.

Before you choose any strike, ask yourself: is the move required to break even realistic given current market conditions and the time remaining? If the answer is no, a different strike or a different entry timing is the better choice.

How Days to Expiry Changes Which Strike to Pick

The same strike behaves very differently depending on how many days remain until the contract expires. Time decay (Theta) accelerates sharply in the final three to five days before Tuesday expiry. The closer you are to expiry, the more aggressively Theta destroys OTM option premiums.

More than 7 days to expiry

With more than a week to expiry, you have time for the trade to develop. Slightly OTM options (one or two strikes away from ATM, delta 0.30 to 0.40) become viable because you have enough time for Nifty to travel to and through your strike. The lower cost of a slightly OTM option relative to ATM makes sense here because there is genuinely time for the move to happen.

3 to 7 days to expiry

This is the window where most retail weekly options trades happen. ATM or one strike OTM is the appropriate range. The ATM strike (delta 0.45 to 0.55) gives you enough responsiveness to a Nifty move while keeping breakeven within a range that a normal weekly move can achieve. Going two or more strikes OTM with less than a week to expiry requires a larger, faster move that most weeks do not produce.

Less than 3 days to expiry

In the final three days, especially on expiry Tuesday itself, stick to ATM or ITM options only if you are buying. OTM options in the final days lose value so rapidly that even a correct directional call can leave you with a loss because theta decay outpaces delta gain for any strike that is more than 50 to 100 points OTM. Many experienced traders avoid buying options in the final two days of a weekly cycle entirely, preferring to either sell premium or wait for the next expiry cycle to open.

How India VIX and Implied Volatility Affect Your Choice

India VIX and implied volatility (IV) affect the cost of every option you buy. When VIX is high, premiums are expensive across all strikes, and you are paying a volatility premium on top of the time value. When VIX is low, premiums are relatively cheap and the same strike costs significantly less.

When VIX is low (below 13%)

Options are cheap. This is the environment where buying ATM or slightly OTM options has the best risk-reward. You are paying a lower premium, and any future increase in volatility (which is likely if VIX is unusually low) will add value to your options on top of any directional gain. In a low-VIX environment, a slightly OTM strike becomes more attractive because the total premium outlay is moderate and the Vega upside from a VIX spike is meaningful.

When VIX is elevated (above 18 to 20%)

Option premiums are expensive. When you buy an option at high VIX, a large portion of what you pay is the volatility premium. If VIX falls after you buy, IV crush removes that premium even if Nifty moves in your direction. In a high-VIX environment, prefer ITM over ATM or OTM when you must buy. ITM options carry more intrinsic value and less relative volatility premium, so IV crush hurts them less than it hurts ATM and OTM options.

The practical rule: check India VIX on the NSE website or in your broker's app before choosing your strike. If VIX is significantly above its 30-day average, move your strike one step toward ITM compared to what you would normally choose. If VIX is near multi-month lows, a slightly OTM strike with lower absolute cost is acceptable because the volatility premium you are paying is small.

IV skew and put strikes

In Nifty options, OTM puts consistently carry higher implied volatility than equidistant OTM calls. This is the volatility skew, driven by institutional demand for downside protection. When choosing put option strikes, this means OTM puts are relatively more expensive than OTM calls at the same distance from ATM. If you are buying puts, you get better relative value at ATM or slightly OTM compared to deep OTM, where the skew inflates the premium significantly.

The Strike Selection Decision Guide: Five Common Scenarios

Abstract rules are useful, but concrete scenarios are more practical. Here is how to apply everything above to the five situations you will encounter most often as a Nifty options trader.

Scenario 1: Strong directional view, 5 to 7 days to expiry

You have done your analysis. You believe Nifty will rally 200 to 300 points over the next week based on technical levels, market context, or a known catalyst. VIX is at a normal 14 to 16%.

Strike to choose: ATM call or one strike OTM. Delta 0.40 to 0.55. Breakeven will be 150 to 250 points above current Nifty, which is achievable for a 200 to 300-point expected move. This is the most common and most appropriate beginner-to-intermediate trade setup.

Scenario 2: Moderate directional view, 10 or more days to expiry

You are moderately bullish with less urgency about timing. You expect a gradual move rather than a sharp one.

Strike to choose: One to two strikes OTM. Delta 0.30 to 0.40. The lower premium cost works in your favour over a longer timeframe, and you have enough time for Nifty to travel to and through your strike without excessive theta pressure. Consider a next-expiry or monthly contract if you need more time.

Scenario 3: High-conviction trade, major event expected

A major catalyst is imminent: an RBI policy announcement, election results, or a Union Budget. You expect a large and fast move but are uncertain of direction, so you want to use a straddle (buying both a call and a put at the same strike).

Strike to choose: ATM for both legs of the straddle. The ATM strike captures the directional move most efficiently in either direction. Buy three to five days before the event (not on event day) so you benefit from IV expansion leading into the announcement. Exit the winning leg before or shortly after the event resolves, before IV crush erases the gains.

Scenario 4: High VIX environment, directional trade

VIX has spiked to 22 or above. You still want to take a directional position because you believe Nifty will move significantly, but premiums are expensive.

Strike to choose: Slightly ITM. Delta 0.55 to 0.70. An ITM option carries more intrinsic value relative to time value, so IV crush hurts it proportionally less than it hurts an ATM or OTM option. You pay more upfront but the trade behaves more predictably when volatility contracts after the event.

Scenario 5: Expiry day scalp (advanced only)

You are an experienced intraday trader on Tuesday expiry day, looking for a quick scalp on a strong Nifty directional move intraday.

Strike to choose: ATM only. Delta close to 0.50. Deep OTM options on expiry day have gamma that makes their premiums highly unstable and their bid-ask spreads wide. ATM options are the most liquid and most predictably responsive to Nifty's direction on expiry day. Set tight stop-losses and plan to exit within the same session. This is not a strategy for beginners.

Reading the Option Chain to Confirm Your Strike

Once you have a shortlist of two or three strikes that fit your scenario, open the Nifty option chain to confirm your choice with real market data. On TradeSmart, tap any Nifty contract in your watchlist and select Option Chain from the quick-action panel.

Look at three things for each candidate strike:

Open Interest (OI): High OI at a strike indicates institutional presence. Strikes with very low OI have fewer active participants, which typically means wider bid-ask spreads and poorer execution. For your first options trades, stick to strikes where OI is reasonably high, generally the five to ten strikes on either side of ATM.

Volume: Volume tells you how actively the market is trading that strike right now. A strike with high OI but zero volume today means positions were built previously but are not being actively traded at this moment. High volume with high OI confirms a live, liquid market at that strike where you can enter and exit smoothly.

Bid-Ask Spread: The difference between the best buying price and the best selling price. For ATM Nifty options, this is typically Rs 0.05 to Rs 0.50. For deep OTM options, spreads can be Rs 2 to Rs 5 or more. A wide bid-ask spread means your effective cost of trading is higher than the displayed premium, because you buy at the ask and sell at the bid. Stick to strikes where the spread is tight.

Three Strike Selection Mistakes That Cost Beginners Money

Mistake 1: Choosing a strike based on absolute premium cost alone

The most common beginner mistake is choosing the cheapest option because it feels affordable. A Rs 20 option is not a bargain. It is a deep OTM option with a delta of 0.05 to 0.10 that requires a massive Nifty move just to break even. At lot size 65, a Rs 20 option costs Rs 1,300 per lot. A Rs 150 ATM option costs Rs 9,750 per lot. The ATM option costs more, but it earns Rs 32.50 per lot for every one-point Nifty move. The deep OTM option earns Rs 3.25 to Rs 6.50. You would need five to ten times the Nifty move to generate equivalent profit from the cheaper strike. In most weeks, that move does not happen.

Mistake 2: Not adjusting strike selection for days to expiry

Traders who learn to pick a strike in one market context often apply the same strike selection to completely different timeframes. Buying two strikes OTM with ten days to expiry and buying two strikes OTM with two days to expiry are fundamentally different trades. The first has time for the move to develop. The second is essentially a bet that Nifty will make a sharp move within hours. Beginners frequently buy OTM options on Monday or Tuesday of the expiry week and then watch them collapse not because Nifty moved against them but because time ran out before the move happened.

Mistake 3: Ignoring breakeven and expecting the maximum possible outcome

Every trader imagines the best case scenario when entering a trade. Nifty will rally 400 points, the OTM option will become ITM, and the profit will be spectacular. This happens. But it should be the exception, not the plan. The plan should be: given current Nifty level, current premium, and days to expiry, what Nifty level do I need by expiry to break even, and is that achievable given recent market behaviour? If your breakeven requires a move larger than Nifty has typically delivered in comparable conditions, reconsider the strike or wait for a better entry point.

🎯 How to choose the right Nifty strike: the short version

• ATM (delta ~0.50): Best for most directional trades. Most responsive per rupee spent. Breakeven requires a moderate Nifty move. Start here until you have at least 20 to 30 trades of experience.
• Slightly OTM (delta 0.30 to 0.40): Lower cost, viable when VIX is low and you have more than 7 days to expiry. Requires a larger Nifty move to profit. Acceptable for moderate moves with adequate time.
• ITM (delta 0.60 to 0.90): More expensive but more predictable. Preferred in high-VIX environments where IV crush risk is high. Behaves closer to a futures contract with loss capped at premium.
• Deep OTM (delta below 0.20): Only appropriate for tail-risk event plays expecting very large fast moves. Not a routine trade. Most weeks they expire worthless. Avoid as a default strategy.
• Always calculate breakeven first: Call breakeven = Strike + Premium. Put breakeven = Strike - Premium. Ask whether that Nifty level is realistically achievable given your time horizon before committing to any strike.
• Adjust for time: More than 7 days to expiry allows slightly OTM. Less than 3 days to expiry, ATM or ITM only. Avoid buying options within 48 hours of weekly expiry unless you are an experienced scalper.
• Check India VIX before buying: High VIX means expensive premiums and IV crush risk. Move toward ITM when VIX is elevated. Use slightly OTM when VIX is near multi-month lows.
• Confirm in the option chain: Check OI, volume, and bid-ask spread at your chosen strike before entering. Avoid strikes with thin OI or wide spreads regardless of how good the delta looks.

Frequently Asked Questions

Which strike price is best for Nifty intraday option buying?

For intraday option buying on Nifty, ATM or one strike ITM is the most practical choice. ATM options have a delta close to 0.50 and respond meaningfully to every 50 to 100-point Nifty move, giving you a realistic profit on an intraday directional trade. Deep OTM strikes require Nifty to make a very large move in a single session, which is a low-probability outcome on most days. On expiry Tuesday specifically, stick strictly to ATM strikes for any intraday buying. OTM options on expiry day lose value so rapidly that correct directional calls still frequently result in losses.

What is the difference between ATM and ITM when buying a Nifty call?

An ATM call has a strike price closest to where Nifty is currently trading. Its premium consists almost entirely of time value and has a delta near 0.50. An ITM call has a strike below the current Nifty level. It already contains intrinsic value (the difference between Nifty's level and the strike price) and has a delta above 0.60. ITM calls are more expensive but behave more like a futures position: they move closer to one-for-one with Nifty. For most retail buyers, ATM is the preferred starting point because it offers good sensitivity at moderate cost. ITM becomes the better choice when VIX is elevated and you want to reduce IV crush exposure.

How far OTM should I go when buying Nifty options?

As a general rule for option buyers, do not go more than one or two strikes OTM (50 to 100 points from ATM for Nifty), and only do so when you have at least 7 days to expiry and a specific reason to expect a larger-than-normal move. Three or more strikes OTM (150 points or more) requires Nifty to make an above-average move just to reach your breakeven at expiry. The lower premium cost is not an advantage if the probability of profiting is extremely low. Think of delta as your guide: avoid buying Nifty options with a delta below 0.25 for directional trades.

Should I change my strike selection when India VIX is high?

Yes, and this adjustment is one of the most underused improvements a retail options buyer can make. When India VIX is above 18 to 20%, premiums are inflated by elevated implied volatility. Buying ATM or OTM options at high VIX means a large portion of your premium is volatility premium that will be extracted by IV crush after the event or market shock that caused the VIX spike. In high-VIX conditions, move your strike one step toward ITM compared to your normal choice. ITM options carry more intrinsic value relative to time and volatility value, making them less sensitive to IV crush while still giving you directional exposure.

How do I use the option chain to choose a strike on TradeSmart?

Tap any Nifty contract in your TradeSmart watchlist and select Option Chain from the quick-action panel. This opens the full chain for that expiry. Look at the Delta column to gauge responsiveness for each strike. Look at the OI and Volume columns to confirm liquidity. Check the LTP (Last Traded Price) for your candidate strike and calculate the breakeven: add the premium to your strike for a call or subtract it for a put, and ask whether Nifty is likely to reach that level before expiry. Compare two or three candidate strikes side by side this way before choosing. The five minutes you spend on this analysis before entering a trade is the most valuable five minutes in options trading.

Can I change my strike after entering a trade?

Not directly. Once you have bought a Nifty option, the strike is fixed for that contract. However, you can roll your position: sell the current option at its prevailing market price and simultaneously buy a different strike in the same expiry (or a different expiry). This is called rolling and is a valid adjustment tool. For example, if you bought a 24,500 CE and Nifty has rallied strongly so that your option is now deeply ITM, you might sell it, take the profit, and buy a new ATM option at the higher strike for the remaining time. Rolling lets you redeploy your capital into a more optimal strike as conditions change, rather than holding a position whose optimal entry point has passed.

⚠️ Disclaimer: Please Read. This article is for educational and informational purposes only. Nothing in this article constitutes investment advice, a trading recommendation, or a solicitation to trade in any financial instrument. All premium figures, delta values, breakeven calculations, and examples used are approximate and for illustration only. Actual values vary with market conditions, implied volatility, days to expiry, and prevailing Nifty levels. The delta-based probability interpretation is an approximation derived from the Black-Scholes model and is not a guarantee of any outcome. Trading in F&O involves substantial risk of loss and is not suitable for all investors. As per SEBI's study (July 2025): 91% of individual traders in the equity F&O segment incurred net losses in FY2024-25, with aggregate retail losses of Rs 1.05 lakh crore. Nifty 50 lot size of 65 units is effective from January 2026 per NSE circular FAOP70616. Nifty weekly expiry on Tuesday is effective from September 2, 2025. NiftyWise.org is an educational platform and is not registered with SEBI as an Investment Adviser, Research Analyst, or Stockbroker. Please consult a SEBI-registered Investment Adviser before making any trading or investment decisions. Visit sebi.gov.in for a list of registered advisers.