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How to Select the Right Strike Price for NIFTY Options

Updated August 2026 · By PaperBull Editorial Team

A strike price is just the level at which an option gives you the right to buy or sell. Nothing complicated about the definition. What actually trips people up is choosing which strike out of the twenty-odd on the chain — and that decision quietly does more to determine your outcome than almost any other choice you'll make in an options trade.

Pick a strike too close to the money and you pay a lot for a modest edge. Pick one too far out and you're paying less for a bet that almost never lands. There's a right answer, but it depends on how confident you are and how much time you've got — not on which strike "feels" cheap.

Jump to: ITM vs ATM vs OTM · Delta & strike selection · Timeframe · The OTM lottery trap · FAQ

ITM, ATM, and OTM — the Three Buckets

None of these is "better" in the abstract — ITM, ATM, and OTM are just different trade-offs between cost, probability, and how much the option moves relative to NIFTY itself. The strike you want depends entirely on the next two sections.

Let Delta Do the Deciding

Delta tells you roughly how much an option's premium shifts for every 1-point move in NIFTY. An ATM NIFTY option runs a Delta near 0.5, so a 100-point move in the index shifts the premium by around 50 points. For the rest of the Greeks and how they interact, see Option Greeks Explained.

What makes Delta genuinely useful for strike selection is its second job: it doubles as a rough probability the option finishes in the money. Delta 0.5 is roughly a coin flip. Delta 0.2 is roughly a one-in-five shot. Once you see Delta that way, strike selection stops being a guessing game and starts being a probability decision.

• High conviction: ATM or slightly ITM. Better odds, but you're paying more for them.
• Moderate conviction: OTM around Delta 0.25–0.35. Cheaper, still a reasonable shot if your read is right.
• Aggressive / speculative: deep OTM, Delta under 0.15. Very cheap, very unlikely to work, large payoff on the rare occasion it does.

Time Left Changes the Answer

The same conviction level calls for a different strike depending on how much runway you have. Theta doesn't care how right you are — it decays every position, and it decays OTM strikes hardest of all as expiry closes in.

The OTM Lottery Trap

Illustrative example — not a recommendation

Far-OTM strikes are seductive because of how little they cost. Say NIFTY is at 24,500 and a 25,500 CE is quoted at ₹5. At the current NIFTY lot size of 65, that's ₹325 at risk for the whole lot. If NIFTY somehow reaches 25,500 before expiry, that same option could be worth ₹1,000 or more — a 200x return on a small stake. It's easy to see the appeal.

The catch nobody puts on the label: NIFTY has to move roughly 1,000 points, about 4%, before expiry for that scenario to happen. It occurs — that's precisely why the trade keeps getting made — but most of the time these options simply expire at zero. Chasing this setup repeatedly is a well-worn way retail accounts bleed out slowly: rare big wins, frequent small losses, and a P&L curve that trends the wrong way over a few months even though every individual loss feels small.

A steadier way to deploy similar capital: one ATM option around ₹150 (₹9,750 per lot at the current 65 lot size) with Delta near 0.5 gives you a genuine shot at profiting from an ordinary-sized move, instead of needing an outsized one to show up on schedule.

Frequently Asked Questions