What is Put Option?
A put option grants the buyer the right to sell the underlying at the strike. Buyers profit from declines; sellers take on obligation if assigned.
Formula
Maximum loss for buyer = premium paid
Indian market context (NSE)
Reference levels: Nifty 50 at 24,300, Reliance Industries at ₹1,300, Bank Nifty futures at 55,000 (lot size 30). Examples below show how Put Option shows up on Indian index, equity, and futures books — update to live quotes in your journal.
Nifty 50 perspective
Nifty at 24,300: weekly/monthly option chains centre on round strikes (24,000 / 24,500). Put Option on ATM Nifty options shifts quickly into expiry — India VIX and event risk (RBI, budget) reprice premiums independent of spot.
Reliance Industries perspective
Reliance at ₹1,300: stock options are American-style on NSE with liquidity concentrated near ATM strikes. Put Option behaviour on ₹1,300 handle differs from index options — watch assignment on short ITM legs before expiry.
Bank Nifty futures perspective
Bank Nifty futures at 55,000: hedging with options or trading put option on Bank Nifty weekly contracts — theta and gamma rise sharply into Thursday expiry; futures leg has no time decay but carries overnight gap risk.
How to validate
- Validate Put Option separately for index weeklies vs stock options.
- Stress-test with expiry-week and event-week subsets (RBI, budget, results).
- Confirm margin and tail-loss scenarios are logged for short premium books.
- Discard readings polluted by untagged discretionary adjustments.
How to track in TradeLyser
- Tag every leg: structure, DTE, moneyness, and whether Put Option was a primary driver.
- Log planned max loss ₹ on entry for short premium strategies.
- Weekly: list open short ITM/ATM legs before expiry with a written roll/close rule.
- Separate F&O account tags from cash equity for Put Option statistics.
Best practices
- Size Put Option trades with margin headroom for gaps and assignment.
- Prefer defined-risk structures when learning a new options concept.
- Roll or close based on written DTE rules, not convenience.
- Keep weekly index and monthly stock books in separate tags.
Common pitfalls
- Short premium without defined max loss while Put Option risk builds.
- Holding illiquid stock options into expiry without a plan.
- Blending index and stock gamma exposure in one tag.
- Ignoring margin spikes on gap opens.
How to use this in TradeLyser
Log hedge vs speculative put tags. Measure whether hedges reduced drawdown during correction weeks.
Related terms
Assignment risk applies when you are short options: the buyer may exercise, forcing you to deliver or take shares (equity) or cash-settle (many index contracts).
A call option grants the buyer the right, not obligation, to buy the underlying at the strike before or at expiry, depending on contract style.
Strike price is the level at which the option buyer can transact the underlying. Moneyness (ATM, ITM, OTM) drives delta, premium, and liquidity.
By trader level
F&O essentials — options traders
Trading Nifty or Bank Nifty options? Master these concepts to understand premium pricing and risk.
FAQ
What is a put option?
A put option gives you the right to sell a stock at a specific price (strike) before a specific date (expiration). You pay a premium for this right. If the stock falls below the strike, you can profit.
When should you buy a put option?
Buy puts when you're bearish—expecting the stock to fall. Puts let you profit from downside without shorting stock. Also used to hedge long stock positions (protective put).
What happens when a put option expires?
If stock is below strike, put is 'in the money'—you can exercise or sell for profit. If stock is at or above strike, put expires worthless—you lose the premium paid.
What's the difference between buying and selling puts?
Buying puts: Bearish, limited risk (premium), high profit potential. Selling puts: Bullish/neutral, limited profit (premium), risk is stock going to zero minus premium collected.
How much can you lose on a put option?
When buying puts, maximum loss is the premium paid. When selling puts, maximum loss is (strike price - premium) × 100 shares, if stock goes to zero.
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