Value investing has long been the cornerstone of many successful investment strategies, championed by legends like Benjamin Graham and Warren Buffett. But what happens when we flip the script? In this article, I explore the unconventional approach of anti-value investing through shorting puts—a strategy that defies traditional wisdom. I break down the mechanics, risks, and potential rewards while providing mathematical rigor and real-world examples.
Table of Contents
Understanding Value Investing vs. Anti-Value Investing
Value investing revolves around buying undervalued securities and holding them until the market corrects their pricing. The core principle is margin of safety—buying assets below intrinsic value to minimize downside risk.
Anti-value investing, in contrast, seeks opportunities where the market overestimates downside risk. One way to exploit this is by shorting put options. Instead of buying cheap stocks, I sell puts on stocks I believe are unlikely to fall as much as the market expects.
The Mechanics of Shorting Puts
When I short a put, I sell a put option contract, obligating me to buy the underlying stock at the strike price if the buyer exercises the option. In return, I receive a premium. My profit is maximized if the stock stays above the strike price, allowing me to keep the premium without assignment.
The payoff function for a short put is:
\text{Profit} = \begin{cases} \text{Premium} & \text{if } S_T \geq K \ \text{Premium} - (K - S_T) & \text{if } S_T < K \end{cases}Where:
- S_T = Stock price at expiration
- K = Strike price
- \text{Premium} = Option premium received
Why Short Puts Instead of Buying Stocks?
- Income Generation – Selling puts generates immediate cash flow, unlike buying stocks, which requires capital upfront.
- Lower Entry Cost – If assigned, I buy the stock at a discount (strike price minus premium).
- Defined Risk – The maximum loss is the strike price minus premium, unlike short-selling stocks, where losses can be infinite.
Risks of Shorting Puts
While the strategy has merits, it is not without risks:
- Unlimited Downside (Per Stock) – If the stock crashes, losses can be substantial.
- Margin Requirements – Brokers require significant collateral, reducing capital efficiency.
- Assignment Risk – If the stock falls below the strike, I must buy it, tying up capital.
Example: Shorting a Put on Company XYZ
Assume:
- Stock price ( S_0 ) = $100
- Strike price ( K ) = $90
- Premium received = $5
- Expiration = 1 month
Scenario 1: Stock stays above $90
- I keep the $5 premium.
- Return on capital (assuming 20% margin) = \frac{5}{0.2 \times 90} = 27.78\%
Scenario 2: Stock drops to $80
- I must buy at $90.
- Net cost basis = 90 - 5 = 85
- Immediate loss = 80 - 85 = -$5
Comparing Short Puts to Other Strategies
| Strategy | Capital Required | Max Profit | Max Loss | Market Outlook |
|---|---|---|---|---|
| Long Stock | High | Unlimited | Full Cost | Bullish |
| Long Call | Low (Premium) | Unlimited | Premium | Bullish |
| Short Put | High (Margin) | Premium | K - \text{Premium} | Neutral/Bullish |
| Short Call | High (Margin) | Premium | Unlimited | Bearish/Neutral |
When Does Shorting Puts Work Best?
- In Overly Pessimistic Markets – When implied volatility is high, put premiums are inflated.
- On Strong Blue-Chip Stocks – Stocks like Apple or Microsoft rarely crash drastically.
- As a Substitute for Limit Orders – Instead of placing a buy limit at $90, I sell a $90 put and get paid to wait.
Mathematical Expectation of Short Puts
To assess profitability, I calculate the expected value:
E = (P_{\text{win}} \times \text{Premium}) + (P_{\text{loss}} \times (\text{Premium} - (K - S_T)))Where:
- P_{\text{win}} = Probability stock stays above strike
- P_{\text{loss}} = Probability stock falls below strike
Case Study: SPY Put Selling
Assume:
- Sell 1 SPY $400 put, premium = $10
- Probability of expiring OTM = 70%
- If ITM, average drop to $390
E = (0.7 * 10) + (0.3 * (10 – (400 – 390))) = 7 + (0.3 * 0) = $7
A positive expectation suggests an edge.
Tax Implications in the US
Short-term puts are taxed as:
- 60% Long-Term Capital Gains (if held over a year)
- 40% Short-Term Gains (if held under a year)
This makes them tax-efficient compared to day trading stocks.
Common Mistakes to Avoid
- Selling Puts on Weak Stocks – No margin of safety.
- Overleveraging – Margin calls can force liquidation.
- Ignoring Black Swan Events – 2020-style crashes can wipe out years of gains.
Final Thoughts
Shorting puts is not pure “anti-value investing” but rather a twist on value principles. Instead of buying undervalued stocks, I get paid to set a buy price. The strategy works best with disciplined risk management and strong stock selection. While not for everyone, it offers a compelling alternative to traditional value investing.
