Option Spread

An option spread is a strategy that combines buying and selling multiple options on the same underlying asset, with different strike prices, expiration dates, or both. By pairing a long option with a short option, the trader caps both risk and reward – the short leg offsets part of the long leg’s cost, while the long leg limits the short leg’s downside.

Naked options expose the seller to unlimited, or near-unlimited, loss. A spread bounds that loss to a number known at entry, which is what makes the position collateralizable at all — a protocol can escrow the maximum loss instead of demanding a margin buffer against an open-ended one.

Debit spreads vs. credit spreads#

Every spread falls into one of two categories based on cash flow at entry:

• Debit spread – the trader pays a net premium. The purchased option costs more than the sold option. Profit comes from a favorable move in the underlying.
• Credit spread – the trader receives a net premium. The sold option is worth more than the purchased option. Profit comes from time decay or the underlying staying in a favorable range.

The distinction matters for collateral: a debit spread’s maximum loss is the premium paid, while a credit spread’s maximum loss is the width of the strikes minus the premium received.

Spread taxonomy#

Spreads are classified by which variables differ between the legs:

Vertical spreads#

The most common category. Two options of the same type (calls or puts) with the same expiration but different strikes. These express a directional view with bounded risk. See the dedicated vertical spread page for payoff profiles and examples.

Calendar spreads#

Same strike, different expirations. The trader is primarily betting on implied volatility changes or exploiting the faster time decay of the near-term option. Maximum profit occurs when the underlying is at the shared strike at the short option’s expiration.

Diagonal spreads#

Different strikes and different expirations – a hybrid of vertical and calendar spreads. These offer more degrees of freedom but are harder to reason about. The trader is typically combining a directional view with a volatility view.

Multi-leg spreads#

Some strategies combine two vertical spreads into a single position:

• Iron condor – a bull put spread and a bear call spread. Four legs, all same expiration. Profits when the underlying stays within a range. Maximum loss is the wider of the two spreads’ widths minus the total premium received.
• Iron butterfly – similar to an iron condor but the short put and short call share the same strike. Higher premium collected, narrower profit zone.
• Butterfly spread – three strikes, same option type. Buy the wings, sell the body (or vice versa). Profits from low volatility when the underlying expires near the middle strike.

Spreads in DeFi#

On-chain options protocols like Lyra, Dopex, and Premia support spread construction, though with important differences from traditional markets:

• Collateral efficiency – some protocols recognize that a spread’s max loss is bounded and reduce the collateral requirement accordingly. Others require full collateral on each leg independently, making spreads capital-inefficient.
• Settlement – DeFi options typically settle in the underlying or a stablecoin, with smart contracts handling exercise automatically at expiration.
• Liquidity – constructing a multi-leg spread requires liquidity at each strike. On-chain options markets are thinner than their TradFi counterparts, so slippage on each leg can erode the spread’s expected payoff.

Choosing a spread#

The right spread depends on the market view:

The option Greeks – particularly delta, theta, and vega – determine how a spread’s value changes as the underlying moves, time passes, and implied volatility shifts. A spread’s net greek is the long leg’s minus the short leg’s, so a spread decays more slowly and reacts to volatility less than the long option would on its own.