The protective put, and what the insurance actually costs
The answer
A protective put means you own a stock and you also buy a put option on it. The put gives you the right to sell at a fixed price. That price becomes a floor under your holding until the option expires. You pay a premium for this, and you pay it whether or not the fall ever comes.
Why this costs you money
Two mistakes, and they are opposite mistakes.
The first is buying no protection and discovering that a 40% fall in a single holding was always possible. That is the mistake the strategy is designed for.
The second is more common and quieter. You buy protection every month, forever, and the cost removes the return you were protecting.
Here is what that looks like. A put roughly 10% below the price, 1 month out, on a normal large company, often costs something like 1% of the value of the holding. this against your own screen; it varies enormously with volatility. Buy it 12 times a year and you have spent something near 12% of the holding on insurance. If the stock returns 12% that year, you kept nothing.
Most retail buyers of protective puts do not do the annual arithmetic. They see a premium of 1% and think of it as small. It is small once. It is not small repeated.
The third mistake sits between them. People buy the put after the fall has started, when the premium has already tripled, and then sell it during the calm that follows. That is buying insurance after the damage has begun, and cancelling it once the risk has passed.
How it works
You own the shares. You buy 1 put per lot, at a strike below the current price, with an expiry date.
- Above the strike at expiry, the put expires worthless. You lose the premium. You still own the shares.
- Below the strike at expiry, the put has value equal to the strike minus the price. That value offsets the fall in the shares, point for point, below the strike.
Your position has a shape. Above the strike you own the stock, minus the premium. Below the strike your loss stops. The combination behaves like a call option on the same stock, which is not a coincidence. It is the same payoff built from different parts.
Three choices decide everything.
The strike. A strike close to the price protects almost everything and costs a lot. A strike far below protects only against a disaster and costs little. This is the deductible on the policy.
The expiry. A 1 month put is cheap per contract and expensive per year, because you buy 12 of them. A 1 year put costs more today and less annually.
The size. 1 contract covers 1 lot. If your holding is not a whole number of lots, you are either partly unprotected or over-hedged.
What it costs, and what it gives up
The premium is the visible cost, and it is 100% at risk. Most protective puts expire worthless, because most months are not crashes. That is not a failure of the strategy. It is the strategy working as designed, in the same way that most years of fire insurance end with no fire.
What it gives up is less obvious.
It gives up part of the upside, permanently. The premium is subtracted from every outcome, including the good ones. Over 10 years of protection you have subtracted a large number from a compounding series.
It gives up the floor you thought you had. The floor applies at the strike, not at today's price. If you buy a put 10% below, you have accepted the first 10% of the fall in full, and then paid a premium on top.
It gives up flexibility. You now have 2 positions to manage and 2 sets of charges. If you sell the shares and forget the put, you hold a naked directional bet you did not intend.
Who is on the other side, and why they are willing to be there
This is the most useful question in this article, because the answer is well documented and it argues against you.
The seller of your put is usually a market-making or volatility-trading firm. They sell it and immediately sell a small amount of the stock to cancel the directional risk. What they are left with is a bet that the volatility priced into your put is higher than the volatility that actually arrives.
Decades of research on index options describe exactly this. Implied volatility sits above realised volatility most of the time. The gap is called the variance risk premium, and it is largest and most persistent in out-of-the-money index puts. the current academic and industry estimates.
Put plainly: the instrument you buy for protection is, on average, the most reliably expensive instrument in the market. It is expensive because a great many people want it for the same reason you do, and because the people who sell it occasionally get destroyed and demand payment for that.
That is not an argument against ever buying one. Insurance is expensive on average and people still buy it, because the average is not the point. It is an argument against buying it as a routine, and a strong argument against buying it when the fear is already in the price.
The maximum loss, as a number
A protective put is one of the few options positions where the maximum loss is genuinely known and genuinely capped.
Take a holding worth 10,00,000 rupees, or 10,000 dollars. You buy a put 10% below, and it costs 1.2% of the value.
- Maximum loss = 10% of the holding, plus the 1.2% premium. That is 1,12,000 rupees, or 1,120 dollars.
- As a percentage of capital committed = about 11.2%, no matter what happens to the company.
That number does not change if the company goes to 0. This is the entire point of the position and it is worth 30 seconds of respect.
The overnight gap. Here the protective put is the strategy that behaves well. It is one of the very few. Because the put is already in your account, a gap down does not need to be traded. You do not need liquidity, you do not need a working stop, and you do not need to be awake.
Three real limits remain.
The strike gap. If the stock gaps from above your strike to far below it, you still take the full distance from the price to the strike. The floor is where you put it.
Trading halts. If the underlying stops trading, your put may stop trading too. You cannot sell it for cash. You must wait for the clearing house to determine settlement. The protection still exists, but you cannot access it on your timetable.
Expiry timing. A put that expired last Thursday protects nothing this Tuesday. A very large number of hedges fail on this alone.
When it is genuinely reasonable to use
Four situations, and outside them the honest answer is usually to hold less of the stock instead.
- A concentrated position you cannot or will not sell. Employee stock, a founder's holding, a position with a large embedded tax liability. Here there is no alternative and the premium is worth paying.
- A known, dated event with a genuinely binary outcome. A court judgement, a regulatory decision, a merger vote. Note that the premium will already be raised for the event, so you are paying full price. The reason to buy anyway is that the size of the possible loss matters more to you than its price.
- A specific period of forced exposure. You need the money in March, and it is January. You are not protecting against the market. You are protecting against a date.
- A position size you would not otherwise take. Some investors use a put to justify holding more of something. This works only if you actually hold the put to expiry. Most do not.
Outside these, remember the alternative that costs nothing: sell some of the stock. Selling 15% of a holding removes 15% of the risk permanently and pays no premium. A protective put is worth buying when selling is not available, not when selling is merely uncomfortable.
The decision rule. Multiply the premium by the number of times you would buy this in a year. If that annual figure is larger than the return you realistically expect from the holding, you are not hedging. You are paying to stay in a position you should be smaller in.
Try this now
Five minutes. Your own holding, no order placed.
- Open your largest single-company holding. Note its total value.
- Open the options chain. Find the put strike about 10% below the current price, for the nearest monthly expiry.
- Multiply the premium per share by the lot size, or by 100 in a US account. That is the cost of 1 month of protection.
- Divide that cost by the value of your holding. Write the percentage down.
- Multiply it by 12.
- Now find the same 10% strike in the expiry furthest away that still shows real volume, and divide its premium by the holding value.
What you should see. The 1 month figure will look small, often around 1%. The annualised figure will not. It is frequently 8% to 15% of the holding for continuous protection at that distance, and much more for a volatile stock. The long-dated put will usually be cheaper per year than 12 monthly puts, sometimes much cheaper.
That difference is the single most useful thing on this page. If you are going to protect a position for a year, buying the year is normally cheaper than buying the month 12 times.
Three real cases
1. Tail-hedge funds, first quarter of 2020 — the payout, and what it cost to wait for it Funds built to hold far out-of-the-money index puts continuously reported extraordinary returns on that portion of their portfolio during the February and March 2020 collapse. the published figures, which were widely reported at the time. What is less discussed is the preceding years. The same strategy loses a small amount almost every single month while it waits. The payout was real and so was the decade of premiums that bought it.
2. Silicon Valley Bank, March 2023 — protection you cannot reach Trading in the shares was halted on 10 March 2023 and the bank was taken into receivership the same day. Options on the shares stopped trading. Holders of puts were correct, and could do nothing about it on their own timetable. Settlement was determined by the clearing house afterwards. The hedge worked. The exit did not exist for a period.
3. Indian markets, 3 and 4 June 2024 — the event you were insured against The Nifty 50 rose sharply on 3 June 2024 on early election expectations and then fell heavily on 4 June 2024 as the actual results came in. the exact percentage moves. Investors who had bought protection before the event held it through a 2 day round trip that a stop-loss order would almost certainly have failed to manage. Premiums into that event were high, because everybody could see the date.
The question that resolves it
A novice asks: how much does this put cost? An expert asks: how much does this put cost per year, and is selling some of the stock cheaper? Almost every bad protective put fails that second question.
What would make this wrong
If out-of-the-money index puts were fairly priced, then a strategy of buying them continuously would break even over long periods before costs. The published long-run studies of systematic protective put strategies do not show that. They show a persistent drag. the current series.
The honest limits.
The drag is an average, and averages are the wrong tool for a risk you cannot survive. If a 50% fall in 1 holding would change your life, the expected cost of the insurance is not the relevant number. This is why people buy term insurance with a negative expected value.
And the drag is not constant. Protection bought when volatility is low and no event is scheduled is far cheaper than protection bought in a panic. The strategy's reputation for being expensive comes largely from people who buy it at the worst moment.
In India
Settlement. Index options on the NSE are European and cash settled. A put on the Nifty 50 pays you cash and never touches your shares. Single stock options are physically settled, so exercising a stock put means delivering the shares. the current NSE settlement rules.
Securities transaction tax on exercise. STT is charged on exercised in-the-money options on the intrinsic value. the current rate and base, which were revised with effect from 1 October 2024. Before an earlier reform, STT on exercise was charged on a much larger base, and traders who let in-the-money options expire rather than selling them suffered losses far larger than the option was worth. The practical instruction survives: sell an in-the-money option rather than letting it be exercised, unless you intend the delivery.
Lot sizes. Protection comes in fixed blocks. If your holding is 1.4 lots you can hedge 1 lot or 2. Hedging 2 means you are short the stock in effect on the extra 0.4, which is a position you did not intend.
Tenor. Long-dated index options are listed in India, but liquidity outside the near expiries is thin. current open interest in far expiries. In practice most Indian hedges must be rolled monthly, which is the expensive way.
Tax treatment. Options gains and losses are business income for most participants, not capital gains, which changes reporting and set-off.
In the United States
Settlement. Index options such as those on the S&P 500 index are European and cash settled. Options on individual shares and on exchange-traded funds are American style and physically settled. A put on an ETF that tracks the market is therefore a different instrument from a put on the index itself, even though the charts look identical.
Tenor. Long-dated options, listed out to 2 or 3 years, trade with real volume on large names and index products. An investor can buy a single contract that protects a position for years without rolling.
Tax. Broad-based index options generally receive a blended long and short term treatment under section 1256 of the tax code, and are marked to market annually. the current rules. Buying a put against stock you own can also suspend or reset the holding period of that stock. the Internal Revenue Service rules on married puts and straddles. This is a real cost for a long-term holder and it is almost never mentioned in strategy articles.
Liquidity. Strike coverage is wide and deep. A put 10%, 20% or 40% below the price all exist and all trade, so you can choose a real deductible rather than the nearest listed one.
Where they differ, and what that tells you
Horizon. The most important difference is not the tax or the settlement. It is that a US investor can buy 2 years of protection in 1 trade, and an Indian investor usually cannot. current far-expiry liquidity on the NSE.
That single fact changes the economics. Rolling a 1 month hedge 12 times a year means paying the widest part of the time-decay curve 12 times, plus 24 sets of transaction costs and 24 chances to be out of the market at the wrong hour. Buying a year in 1 trade avoids all of that.
What that tells you is that the Indian version of this strategy has to be used more selectively. In the United States, continuous protection is a plausible long-term policy. In India, continuous protection is expensive enough that the honest alternative — holding less of the concentrated position — wins more often.
Delivery. An Indian stock put that finishes in the money delivers shares and attracts STT on the intrinsic value. A US index put simply pays cash. The Indian hedger must therefore plan the exit of the option, not only its purchase. Letting it expire is a decision with a cost attached, and it is the mistake that has produced the largest unexpected losses in Indian retail derivatives.
Carry this
- The floor is at the strike, not at today's price. You accept everything above it.
- Multiply the premium by 12 before you decide anything.
- The cheapest hedge is usually owning less. Buy the put when selling is impossible, not when it is uncomfortable.
- Never let an in-the-money option expire in India. Sell it.
Knowledge check
Related
- The covered call
- The collar
- Hedging with options
- Vega, and how volatility alone moves your option
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