Introduction

The Cboe Quoted Spread Book (QSB) service introduces the ability for Market Makers (MMs) to quote select complex instruments designated by the Exchange. Prior to QSB, bulk quoting was not available to MMs for any complex instrument. The Binary Order Entry (BOE) protocol Complex Quoting Interface enables MMs to submit quotes for select exchange designated complex instruments.

Complex instruments designed by the Exchange will be available for quoting during Regular Trading Hours (RTH). Symbol reference data identifying the designated instruments is available on the Cboe Titanium U.S. Options Complex Multicast PITCH Specification and Cboe Titanium U.S. Options Complex Multicast TOP Specification data feeds, and on the Cboe.com website, prior to the start of RTH. Specifically, customers can access designated instrument reference data via the Exchange Designated Complex Instrument Definition message disseminated on the U.S. Options Complex Multicast PITCH and TOP data feeds, and via a JSON-formatted file downloaded from the Cboe US Options Reference Data webpage.