Definition
A put option gives the holder the right, but not the obligation, to sell an underlying asset at a strike price before or at expiration, depending on contract terms. A short stock position sells borrowed shares and remains exposed until covered.
Comparison
| Structure | Maximum loss | Main cost | Main timing risk |
|---|---|---|---|
| Short stock | Theoretically unlimited | Borrow, margin, dividends | Can be forced by margin or borrow stress |
| Long put | Premium paid | Option premium | Can expire before the thesis plays out |
| Put spread | Net premium paid | Lower net premium | Payoff is capped and expiry still matters |
Worked example
A stock trades at $100. A direct short gains dollar-for-dollar if the stock falls, but loses as the stock rises. A $100 strike put may gain value if the stock falls below the strike before expiration, but the buyer can lose the entire premium if the stock does not move enough in time.
Common mistakes
- Treating limited loss as low risk.
- Buying options with too little time for the thesis.
- Ignoring implied volatility and event pricing.
- Comparing options and stock shorts without including borrow fees and dividends.
Stock Shorter framing
Put spreads often match multiple-compression research better than lottery-style options. The expected move in a SaaS repricing is usually a defined drawdown tied to evidence and catalysts, not necessarily a zero. The SaaS playbook explains how structure, timing, and invalidation fit together.
Options involve risk and are not suitable for every investor. This page is educational and is not a recommendation.