Strategy #0000000002 · Hedging and risk management
Protective put
Pay a known premium to put a floor under a long position.
Own the share and buy a put. The put gives you the right to sell at its strike, limiting the loss below that level while leaving upside open.
Three ways in
Understand the story. Then inspect the risk.
Start with a familiar situation, check the payoff, then test how the numbers change.
The idea · in two minutes
Rose buys a seat belt for her shares; Jack points out it is not a chauffeur.
Rose owns a share worth £100 and worries it could fall before she needs the money. She pays Jack £3.25 for a put with a £95 strike. Jack jokes that she has bought “financial bubble wrap”. Rose replies that bubble wrap still costs money: the £3.25 premium is the price of the protection.
If the share rises to £120, Rose keeps the upside, less the premium. If it falls to £60, she can sell for £95; after the £3.25 premium, her loss is limited to £8.25 per share. If the share stays above £95, the put may expire unused and the premium is lost.
A protective put is insurance, not a prediction. It can make a bad outcome more manageable, but repeated premiums can weigh on returns. Rose has bought a floor, not a promise that the lift only goes up.
| Underlying at expiry | Share P/L | Options P/L | Total | What happens |
|---|---|---|---|---|
| £60 | −£40.00 | +£31.75 | −£8.25 | The put limits the loss below its strike. |
| £95 | −£5.00 | −£3.25 | −£8.25 | The share is flat; the premium is the cost. |
| £100 | £0.00 | −£3.25 | −£3.25 | Upside remains open above the strike. |
| £120 | +£20.00 | −£3.25 | +£16.75 | The put offsets most of the fall below £95. |
Illustrative figures only. They exclude fees, tax, financing and other costs unless stated. They are not live prices or a recommendation.
The mechanics · payoff and exposure
The position is long stock plus long put. Below the put strike, the option’s gains offset further losses in the share; the premium is the insurance cost.
S₀ is the entry share price, Sₜ the expiry price, K the put strike and P the put premium paid per share.
Greeks: the directional intuition
- Delta
- Measures first-order sensitivity to the underlying price.
- Gamma
- Measures how quickly delta changes as the underlying moves.
- Theta
- Captures the effect of time passing, all else equal.
- Vega
- Measures sensitivity to implied volatility.
The position is long stock plus long put. Below the put strike, the option’s gains offset further losses in the share; the premium is the insurance cost.
Practical context · published observations
Cboe PPUT: read the record with its caveats.
The chart uses the published figures or explicitly labelled study inputs below. A historical index or model replay is not the same as an investor’s realised account return.
Published index returns are hypothetical rules-based results. Fees, taxes, execution, reinvestment and investor behaviour can change actual outcomes. Source ↗ · Methodology ↗
What if the underlying expires here?
Adjust the inputs to see a theoretical expiry payoff. The starting values are teaching assumptions, not live quotes.
Calculation model: This simplified expiry model excludes early close-out value, assignment timing, funding, tax, dividends and transaction costs.
Variants · same family, different risk levers
Eight close relatives change the premium, trigger or scope of protection.
A collar gives up some upside to reduce the premium; rolling and tail-risk rules change when protection is held. A neighbouring strategy is not the same put payoff.
| Related strategy | Relationship | What changes | New cost or risk |
|---|---|---|---|
| Protective call (married call) | Payoff relative · opposite direction | Short a share and buy a call to cap losses from a rise: the short-side mirror of a protective put. | Shorting brings borrow fees, recall and squeeze risk; it is not a direct substitute for insurance on a long portfolio. |
| Collar (fence) | Premium-funding variation | Hold shares, buy a lower-strike put and sell a higher-strike call to offset part of the put premium. | The protection costs less, but gains are capped at the call strike. |
| Improved CMBO collar | Index-rule variation | Change collar-index put/call strikes and rebalancing rules to alter protection cost and upside limits. | Results depend on the rules and option quote timing; index returns are not investor fills. |
| Put rolling | Rolling rule | Use remaining time value and tenor to decide when to replace a put or change its strike. | Renewal requires decisions; gaps or volatility changes can push actual costs away from average estimates. |
| Tail-risk-triggered protection | Timing variation | Use correlation, market state or warning signals to decide when to buy puts or reduce exposure. | A signal may arrive too late, leaving the portfolio unprotected when a crash begins. |
| Crisis-hedge comparison | Comparison framework · related research | Compare puts, trend following, quality shares, gold or government bonds over the same stress periods. | Crisis samples are few and selection affects the result; hindsight cannot identify a dependable winner. |
| Protective put versus stop-loss | Alternative exit rule | Compare paying for a contractual strike floor with selling after a price trigger. | A put has a premium but does not rely on a stop fill; stops face gaps, slippage and temporary whipsaws. |
| In-the-money protective put | Strike variation | Buy an in-the-money put for more intrinsic value and a higher downside floor from the outset. | Premium and capital needs are usually higher; compare cost and hedge strength together. |
The source groups several related ideas under protective puts. The table separates opposite payoffs, funding choices, timing rules and comparison studies.
Read beyond the summary
References
Primary sources and research used to describe the strategy and its limits.
- 01Cboe, “Hedging Downside Exposure with PPUT, CLL and CLLZ Indices.”official
- 02Cboe Portfolio Protection: strategy description and historical stress-quarter returns.official
- 03Options Clearing Corporation, Characteristics and Risks of Standardized Options (June 2024).official
- 04Figlewski, Chidambaran & Kaplan (1993), “Evaluating the Performance of the Protective Put Strategy,” Financial Analysts Journal.research
- 05Liu & Chang (2020), “Can the Improved CMBO Strategies Beat the CMBO Index?,” The Journal of Derivatives.research
- 06Tannous & Lee-Sing (2008), “Expected Time Value Decay of Options: Implications for Put-Rolling Strategies,” Financial Review.research
- 07Packham et al. (2016), “Tail-risk protection trading strategies,” Quantitative Finance.research
- 08Harvey et al. (2019), “The Best of Strategies for the Worst of Times: Can Portfolios Be Crisis Proofed?,” The Journal of Portfolio Management.research
- 09McKeon & Svetina (2017), “Protecting against Loss: Protective Put Strategies versus Stop-Loss Strategies,” The Journal of Investing.research
- 10Dash & Goel (2014), “A Comparison of ITM and OTM Protective-Puts and Covered-Calls,” Asian Journal of Finance & Accounting.research
- 11Kakushadze & Serur (2018), 151 Trading Strategies, §2.4 Protective put. Author version.source