Strategy

Box Spread

By Ryan Silk & Lawrence Polatchek · Reviewed April 2026 · Options Trading Glossary

Synthetic loan using combined call and put spreads

What is Box Spread?

Box Spread A combination of a bull call spread and a bear put spread at the same strikes, creating a synthetic loan. The value at expiration equals the strike width regardless of the underlying price. Box spreads are used for arbitrage and financing, as they should be priced at the present value of the strike width discounted at the risk-free rate.

Complete Definition

A combination of a bull call spread and a bear put spread at the same strikes, creating a synthetic loan. The value at expiration equals the strike width regardless of the underlying price. Box spreads are used for arbitrage and financing, as they should be priced at the present value of the strike width discounted at the risk-free rate.

AV
Written by
ApexVol Research Team
Quantitative options research
All calculations use live ORATS institutional data — the same source used by professional volatility desks.
RS
Technical reviewer
Ryan Silk, ApexVol Founder
Reviewed for technical accuracy
10+ years trading options. Built ApexVol's pricing engine, Greeks model, and IV-rank methodology.
This guide is updated as market conditions and ORATS data change. Last revised 2026-05-12. How we research →

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