Cboe Options Updates Quoted Spread Book Box Strikes

Effective July 28, 2025, Cboe Options Exchange (C1) will update exchange designated spreads comprising Quoted Spread Book Box Spreads and Box Swaps from 4000 and 5000 strikes to 5000 and 6000 strikes.

Currently, customers can access exchange designated Quoted Spread Book spreads each day using Exchange Designated Complex Instrument Definition messages on Complex PITCH and TOP data feeds. In addition, users can access designated spreads on the Quoted Spread Book Reference Data page.

Upon the effective date, the presented Box Spreads and Box Swaps will change from using 4000 and 5000 strikes to using 5000 and 6000 strikes.

In the future, Cboe may update the strikes without a Trade Desk notice. Customers should rely on the market data feeds and/or the reference data to obtain information on current Quoted Spread Book symbols.

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