Reading Option Payoff Diagrams
The hockey-stick charts that show profit and loss at expiry — how to read any of them at a glance.
A payoff diagram plots your profit/loss (vertical) against the underlying’s price at expiry (horizontal). For optionsThe right, not the obligation, to buy or sell at a set price. these make a distinctive bent “hockey-stick” shape — and learning to read them at a glance lets you understand any strategy, no matter how complex, just by looking.
- Long callThe right, not the obligation, to buy or sell at a set price. — flat (loss = premium) below the strikeThe fixed price at which an option can be exercised., rising line above it: limited loss, large upside.
- Long putThe right, not the obligation, to buy or sell at a set price. — flat (loss = premium) above the strikeThe fixed price at which an option can be exercised., rising line as price falls below it: limited loss, large downside-profit.
- Short optionThe right, not the obligation, to buy or sell at a set price. — the mirror image (flipped vertically): a flat gain (the premium) that turns into a steep loss when the optionThe right, not the obligation, to buy or sell at a set price. goes against you.
- Breakeven — the price where the line crosses zero P&LA record of revenue, costs and profit over a period. (strikeThe fixed price at which an option can be exercised. ± premium); above/below it you’re in profit/loss.
Do payoff diagrams show profit before expiry too?
The classic diagram shows P&L *at expiry* (when time value is gone, so the shape is clean angles). Before expiry, time value rounds the kinks into smooth curves, and the position can be worth more or less than the at-expiry line due to time and volatility (the Greeks). The at-expiry diagram is the foundation; the Greeks explain the in-between behaviour.