# Ratio Spreads

> Ratio spreads buy and sell different numbers of options at different strikes. Learn front ratios, backspreads, payoffs, uses and the risk of the extra short options.

Source: https://learn.tradelabsai.com/options/ratio-spreads/  
Track: Options · Level: Advanced · Updated: 2026-10-03  
Publisher: TradeLabs AI (https://tradelabsai.com). Education, not financial advice.  
Cite as: TradeLabs Learn, "Ratio Spreads", https://learn.tradelabsai.com/options/ratio-spreads/

A ratio spread buys and sells options of the same type and expiration at different strikes, in unequal quantities. The most common forms are the 1:2 front ratio spread, which buys one option and sells two further out of the money, and the backspread, which does the reverse. Ratio spreads let traders target a price zone at low or no cost, or take a cheap bet on a large move, but the unequal quantities create exposures that are easy to underestimate.

## Front ratio spread (1 by 2)

Buy one option closer to the money and sell two further out of the money.

| Feature | 1:2 call front ratio |
|---|---|
| Construction | Buy 1 lower call, sell 2 higher calls |
| Cost | Often small debit, zero or a credit |
| Best outcome | Price finishes at the short strike |
| Risk | Losses above the upper break even have no cap (one extra short call) |
| Greeks | Short gamma and short vega overall |

**Example: A call front ratio**
A stock trades at $100. You buy one $100 call for $3.50 and sell two $110 calls for $1.20 each. Net debit: $1.10 ($110).

| Stock at expiry | Result |
|---|---|
| $100 or below | minus $110 |
| $101.10 | $0 |
| $110 | +$890 (maximum: $10 minus $1.10) |
| $118.90 | $0 |
| $130 | minus $1,110, and losses grow $100 for every $1 higher |

It works well if the stock rises moderately to about $110, but a big rally becomes costly because one short call is uncovered.

## Backspread (ratio backspread)

Sell one option closer to the money and buy two further out of the money. It is the mirror image of a front ratio.

| Feature | Call backspread (1 by 2) |
|---|---|
| Construction | Sell 1 lower call, buy 2 higher calls |
| Cost | Often a small credit or debit |
| Best outcome | A large move up |
| Worst outcome | Price finishes at the long strike |
| Greeks | Long gamma and long vega overall |

**Example: A call backspread**
With the stock at $100, sell one $100 call for $3.50 and buy two $110 calls for $1.20 each. Net credit: $1.10.

- **Stock at $90:** all expire. Keep $110.
- **Stock at $110:** short call loses $10, long calls worthless. Net loss: $10 minus $1.10 = $8.90 ($890), the maximum loss.
- **Stock at $130:** short call loses $30, long calls gain $40. Net gain: $10 + $1.10 = $11.10 ($1,110), and more for each $1 higher.

Put backspreads are used the same way for large downside moves, often as cheap crash protection.

## Why traders use ratios

- **Target a price cheaply:** front ratios can be opened for little or no cost, betting on a move to a specific level.
- **Take advantage of skew:** if out of the money options look expensive relative to closer ones, front ratios sell them; if cheap, backspreads buy them. See [Skew Trading](https://learn.tradelabsai.com/volatility/skew-trading/) and [Volatility Smile and Skew](https://learn.tradelabsai.com/volatility/volatility-smile-and-skew/).
- **Cheap tail exposure:** backspreads can profit greatly from extreme moves at low or no cost.

## Risk in front ratios

The extra short option means a front ratio becomes a naked short option beyond the upper break even. Large moves, especially gaps on news, can create big losses. Ways to manage this:

- **Buy a further out of the money option** to cap the risk, turning the trade into a broken wing butterfly. See [Butterfly Spread](https://learn.tradelabsai.com/options/butterfly-spread/).
- **Close or adjust** if price approaches the upper break even.
- **Avoid events** like earnings.

## Risk in backspreads

Backspreads lose most when the price drifts to the long strike and stops there. Time decay works against them as expiry approaches. See [Theta](https://learn.tradelabsai.com/options/theta/).

## Greeks of ratio spreads

Because quantities are unequal, ratio spreads can carry significant net gamma and vega. A front ratio is short both; a backspread is long both. Always check position Greeks and a full payoff diagram before trading. See [Managing Portfolio Greeks](https://learn.tradelabsai.com/options/managing-portfolio-greeks/) and [Option Payoff Diagrams](https://learn.tradelabsai.com/options/option-payoff-diagrams/).

## Common mistakes

- **Treating a front ratio as low risk** because it costs little.
- **Not having a plan** for a move through the upper break even.
- **Holding backspreads** while they decay near the long strike.

## Frequently asked questions

### What is a ratio spread?

An options position that buys and sells different numbers of options at different strikes, such as buying one call and selling two higher strike calls.

### What is a backspread?

A ratio spread that sells fewer options and buys more, such as selling one call and buying two higher strike calls, profiting from large moves.

### Are ratio spreads risky?

Front ratios carry uncapped risk beyond the upper break even because of the extra short option; backspreads have a defined maximum loss near the long strike.

Next, learn the model behind modern option pricing in [Black-Scholes Model](https://learn.tradelabsai.com/options/black-scholes-model/).

## Continue learning

- Next lesson: [Black-Scholes Model](https://learn.tradelabsai.com/options/black-scholes-model/)
- Previous lesson: [Strangle](https://learn.tradelabsai.com/options/strangle/)
- Related: [Strangle](https://learn.tradelabsai.com/options/strangle/): A strangle buys or sells an out of the money call and put. Learn how it compares with a straddle, break evens, strike choices and the risks of short strangles.
- Related: [Vertical Spreads](https://learn.tradelabsai.com/options/vertical-spreads/): A vertical spread buys and sells options of the same type and expiry at different strikes. Learn debit vs credit spreads, the four types and how to choose widths.
- Related: [Butterfly Spread](https://learn.tradelabsai.com/options/butterfly-spread/): A butterfly spread buys one option, sells two at a middle strike and buys one higher. Learn the payoff, why it is cheap, broken wing variants and how to use it.
- Related: [Skew Trading](https://learn.tradelabsai.com/volatility/skew-trading/): Skew trading bets on changes in the implied volatility difference between strikes. Learn risk reversals, put spread structures, what drives skew and the risks.
- Related: [Gamma](https://learn.tradelabsai.com/options/gamma/): Gamma measures how much an option's delta changes for a $1 move in the underlying. Learn why gamma peaks at the money near expiry and how it drives risk.
- Related: [Volatility Smile and Skew](https://learn.tradelabsai.com/volatility/volatility-smile-and-skew/): Implied volatility differs by strike, forming a smile or skew. Learn the shapes in equities, FX and commodities, why they exist and how to measure skew.