Federal Register #SR-CboeBYX-2026-039

SEC notice of Cboe BYX’s proposed optional Start Time order instruction

This SEC notice concerns a proposed Cboe BYX Exchange rule change, not a government procurement opportunity. - Government agency: Securities and Exchange Commission (SEC). - Named organizations: Cboe BYX Exchange, Inc. proposed the change; Cboe EDGX Exchange, Inc. is cited as having a similar framework. - Proposal: Amend BYX Rule 11.1(a) to add an optional Start Time instruction for orders entered before Regular Trading Hours. - Users could choose an execution-eligibility time in 30-minute increments, from 7:00 a.m. through 9:00 a.m. - Orders becoming eligible at the selected time would be handled in time sequence. - Existing order-acceptance restrictions would apply before the later of 7:00 a.m. or the selected Start Time. - Other details: The proposal retains the existing order-entry window and Time in Force options; using the instruction would be optional. - Procurement items: No products, services, quantities, OEMs, vendors, or contract value are identified.

Description

Cboe BYX Exchange, Inc. proposes to amend Exchange Rule 11.1(a) to add an optional Start Time order instruction. The instruction would let users select, in 30-minute increments before Regular Trading Hours, when an order entered earlier becomes eligible for execution. The proposal also updates order sequencing and acceptance restrictions to align with the designated Start Time, while retaining existing order categories and the 7:00 a.m. threshold. The Exchange stated that it intends to implement the change on December 7, 2026.

View original listing