Ratio Spread: Financing Direction With Extra Short Options
A ratio spread buys and sells options in an unequal ratio (often 1x2) to trade a range cheaply — but it carries open-ended risk. Here's how it works.
Short answer: A ratio spread buys and sells options in an unequal ratio — most commonly buying one option and selling two further-out options (a 1×2). The extra short option finances the trade (often for little cost or a small credit), making it profitable in a range — but it adds an uncovered short, so one side has open-ended risk. It's an advanced strategy.
How to build it (call ratio spread, 1×2)
- Buy 1 call near the money.
- Sell 2 calls further out of the money.
- Same expiry. Often a small net credit or near-zero cost.
The first short call covers the long; the second short call is naked — the source of both the financing and the tail risk.
The payoff intuition
- If the underlying drifts up modestly toward the short strikes, the trade profits.
- If it explodes past the short strikes, the extra short call creates open-ended loss (for a call ratio) — this is the danger.
- A put ratio spread mirrors this on the downside.
When to use it — and the warning
Ratio spreads suit a mild directional + range view when you want cheap exposure. But the uncovered short means they are not defined-risk — never run one without a hard stop-loss or a protective wing (which converts it toward a defined-risk structure). For purely defined-risk directional trades, prefer a bull call or bear call spread.
FAQ
Is a ratio spread safe? No — the extra short leg has open-ended risk on a large move. It's an advanced strategy that demands active management.
Why trade it at all? It can be entered for little or no cost and profits across a range, with positive theta — attractive when you have a clear range view and manage risk tightly.
Model ratio spreads with a live payoff so you see the tail risk before you trade — in Gravity Algo. Explore → · Start free →.