A protective put is the options version of insurance. You own shares and you buy a put option on the same shares. The put gains value if the share price falls below its strike, offsetting the loss on the shares. If the share rises instead, the put expires worthless and you have paid a premium for peace of mind, just as you pay for car insurance in a year without accidents.
It is also called a "married put" when the shares and the put are bought at the same time. For how a put works on its own, see put options explained and the long put strategy.
How the payoff works
- Share falls below the strike: every rupee lost on the shares below the strike is made back by the put. Your loss stops at a fixed floor.
- Share stays between the strike and your purchase price: you lose the drop plus the premium.
- Share rises: you keep the whole rise, minus the premium paid for the put.
Maximum loss = (purchase price − put strike) + premium paid
Breakeven = purchase price + premium paid
A worked example
You hold shares of Reliance Industries bought at ₹1,400, in a quantity equal to one lot of its options (check the current lot size on NSE). Results are due and you want protection for the month. You buy the ₹1,340 put for ₹20 a share.
Your maximum loss is (1,400 − 1,340) + 20 = ₹80 a share, about 5.7%, no matter how far the share falls before expiry. Your breakeven moves up to ₹1,420.
| Share at expiry (₹) | Shares P/L | Put P/L | Total per share | Comment |
|---|---|---|---|---|
| 1,150 | −250 | +170 | −80 | Floor holds in a crash |
| 1,250 | −150 | +70 | −80 | Floor |
| 1,340 | −60 | −20 | −80 | At the put strike |
| 1,400 | 0 | −20 | −20 | Flat share, premium is the cost |
| 1,420 | +20 | −20 | 0 | Breakeven |
| 1,500 | +100 | −20 | +80 | Upside kept, less the premium |
| 1,600 | +200 | −20 | +180 | No cap on gains |
Without the put, a fall to ₹1,150 would cost ₹250 a share. With it, the loss is ₹80. The price of that certainty is ₹20 a share whenever the fall does not come.
Live example: is protection cheap or expensive today?
The cost of a put depends heavily on implied volatility. India VIX is the market's fear gauge for NIFTY options; the box below shows where it stands against its range over the past year:
A low IV rank means insurance is relatively cheap; a high rank means puts are pricey, usually because the market has just fallen or an event is near. Many investors buy protection when it is cheap rather than waiting until they feel nervous.
For index protection, the put side of the NIFTY option chain shows what each level of cover costs right now:
Read the put prices from the at-the-money row downwards. Each strike lower is cheaper but leaves a bigger gap before protection starts, just like a higher deductible on an insurance policy.
Choosing the strike: how much deductible?
- At the money put: protection starts almost at once, but it is the most expensive.
- Out of the money put (say 5% below the price): much cheaper, but you absorb the first 5% of any fall yourself.
- Far out of the money: very cheap "crash insurance" that only pays in a severe fall.
There is no right level. It depends on how big a loss you can live with and how often you plan to buy protection.
Protecting a whole portfolio with NIFTY puts
Buying puts on every stock you own is costly, and many stocks have thin option markets. A common alternative is buying NIFTY puts sized to the portfolio's value. This works best when the portfolio moves broadly in line with NIFTY; a portfolio of small caps or one sector may fall much more than the index, leaving gaps in the cover. The portfolio hedging guide covers how to size such a hedge using beta.
The cost over time
A monthly put costing 1.5% of the share price adds up to around 18% a year if bought every month. That can wipe out a large part of a stock's normal return. So most investors use protective puts for specific periods, such as around results, a budget, an election or after a big gain they want to lock in, rather than all the time.
Two ways to cut the cost:
- Buy a longer-dated put, which costs less per month than rolling weekly or monthly ones.
- Sell an out-of-the-money call against the same shares to pay for the put. That creates a collar, which caps the upside as well as the downside.
You can model the protected position, including a collar, in the strategy builder.
Protective put vs stop-loss order
Many investors ask why they should pay for a put when a stop-loss order is free. The two do different jobs:
- A stop-loss sells your shares at the market once a trigger price is hit. It costs nothing up front, but in a gap down (bad results announced after the close, global news overnight) the share can open far below your trigger and the sale happens at that lower price. A stop-loss also sells you out of the position on a brief dip that recovers the same day.
- A protective put guarantees the strike price until expiry, gaps or not, and you keep the shares. If the share falls and then recovers, you still own it. The cost is the premium, paid whether or not it is needed.
So a put suits holders who want to keep the shares through a risky period without being shaken out, and who accept a known cost for that. A stop-loss suits traders who would rather exit than pay for insurance. The stop-loss guide covers order types and where gaps can catch you.
Before expiry, the put also gains value from rising fear. When the market falls sharply, India VIX tends to jump, so a put held through a sell-off can be worth more than its intrinsic value alone. Some investors sell the put into that spike and buy a new, cheaper one later; others keep it as the floor it was bought to be. The India VIX guide explains what drives the fear gauge.
Common mistakes
- Buying protection after the fall. Fear makes puts expensive exactly when people want them.
- Mismatched size. Too few puts leave part of the holding unprotected; too many turn the hedge into a bearish bet.
- Letting protection lapse unnoticed. Puts expire. If you still want cover, it has to be renewed.
- Index puts on a non-index portfolio. A hedge on NIFTY does not protect a stock that falls on its own news.
- Physical settlement of stock puts. An in-the-money stock put at expiry means delivering shares; check how your broker handles it.