What is a Protective Put?

A protective put is like buying insurance for your stock portfolio. You own the stock and buy a put option to protect against a decline. If the stock crashes, your put option gains value, offsetting the loss in your stock.

Think of it this way — you paid a small premium (the insurance cost) to guarantee you can sell your stock at a fixed price, no matter how far it falls.

How Protective Put Works

Let me show you with an example. Suppose you own 250 shares of TCS at ₹3,800 per share (total investment ₹9,50,000). You are worried about a market crash.

  1. You buy one TCS 3,700 Put option expiring next month at ₹50 per share
  2. Total cost: 250 × ₹50 = ₹12,500
  3. If TCS crashes to ₹3,200, your put option is worth ₹500 per share (₹1,25,000)
  4. Your stock loss: (3,800 - 3,200) × 250 = ₹1,50,000
  5. Net loss: ₹1,50,000 - ₹1,25,000 + ₹12,500 = ₹37,500

Without the put, you would have lost ₹1,50,000. The protective put saved you ₹1,12,500.

Cost of Protection

The put option costs money. This is the premium you pay. The cost depends on:

  • How far OTM the put is (lower strike = cheaper but less protection)
  • Time to expiry (longer expiry = more expensive)
  • Implied volatility (higher VIX = more expensive)

A typical ATM protective put costs 2-4% of portfolio value per month. This is the cost of insurance.

When to Use Protective Puts

  • Before major events (budget, election results, RBI policy)
  • When your portfolio has large unrealized gains
  • During high uncertainty periods
  • When you cannot afford to sell but want downside protection

Protective Put vs Stop Loss

A stop loss executes at market price when the stock hits your trigger. A protective put guarantees a specific selling price. Stop losses can gap down in crashes, but puts always give you the strike price.

SEBI Disclaimer

This article is for educational purposes only. Options trading involves substantial risk of loss.

Collar Refinement: The Insurance Discount

A protective put's you can be subsidised by selling a call. The collar trade:

  • Buy an index put at a level you can live with, say Nifty at 98% of current price.
  • Sell an OTM call at roughly 104-106% of current price to pay for part of the put's cost.
  • Outcome: defined downside, capped upside, and an insurance bill cut to a fraction of the naked put's premium.

The collar is the practical way most portfolios actually insure, because free insurance does not exist; selling the call is how you pay the premium with borrowed upside.

Partial Coverage Rules

Insuring everything is the most expensive way to learn nothing. Most professionals hedge in tiers:

  • Insure 50-70% of the portfolio's index-beta with a put at 90-95% of the current level ahead of known catalysts.
  • Bring coverage to 100% only around binary events (Budget, elections, earnings-heavy weeks).
  • Never buy a full-coverage put with zero risk-management plan; the insurance only pays if the trigger is honest and the expiry is right.

ATM Versus OTM Put: The Math of What You Pay

Strike choice is a coin flip between two honest costs:

  • An ATM put protects nearly everything but costs 2-3x an OTM put; you buy certainty, not cheapness.
  • An OTM put at 5% below price is cheap but only pays after a real event; partial coverage with a cheaper strike leaves a survivable hole.
  • The standard professional ladder: 50% OTM strikes at modest cost, rolled down as the market falls, which is cheaper than one deep-insurance bill paid at the wrong moment.

Rolling Weekly Insurers

Static insurance decays unused; dynamic rolls convert it into a living strategy:

  • Weekly puts you roll every Friday: re-buy the same protection for the next 7 days, paying fresh theta each week.
  • Re-anchor strikes to the current price each roll, keeping the dollar-value of protection roughly constant until the trigger fires.
  • After a crash starts, beware the post-gap price: rolling a put deep in the money after a 10% gap buys the cheapest possible insurance at the worst possible moment.

Expiry and Tax Notes

Insurance positions have their own calendar and ledger:

  • Index options are cash-settled, so a protective put on Nifty never forces shares; equities hedging needs the put plus a defined settlement path at exercise.
  • Premiums paid are business expenses if the book is a trade; for an investment portfolio the premium reduces the overall realisation accounting at exit, and every rupee of premium is a rupee of drag you must earn back.

A protective put is not a bet; it is the price of staying in the game long enough for your long-term thesis to matter. The tactical parts, collars, tiers, rolls and strike ladders, decide whether that price is survivable or suffocating, and the portfolio that pays it deliberately is the portfolio that can keep its winners fully exposed when everything else panics.