What Is the Primary Risk Associated with Executing a Box Spread?

The primary risk associated with a box spread is counterparty risk, especially in the over-the-counter market, although this is mitigated on a centralized exchange by the clearing house. On an exchange, the main risk is transaction costs and slippage.

Because the theoretical profit is small (tied to the risk-free rate), high commissions or adverse execution prices (slippage) on the four legs can easily turn the theoretical profit into a loss.

How Do Professional Traders Minimize Transaction Costs When Legging into a Straddle?
Can Complex Options Strategies like Box Spreads Genuinely Offer Risk-Free Arbitrage?
What Is “Legging Risk” When Executing a Multi-Leg Options Strategy Manually?
What Is a “Box Spread” and How Does It Utilize Synthetic Positions?
What Are the Primary Costs That Erode the Profitability of a Funding Rate Arbitrage Trade?
How Do Transaction Costs Affect the Profitability of Arbitrage?
Why Are Transaction Costs the Primary Barrier to Realizing the Full Theoretical Arbitrage Profit?
Why Is It Crucial for an Arbitrageur to Accurately Calculate the Transaction Costs When Assessing the Basis?

Glossar