Cboe BYX amends Rule 11.22 to describe Cboe One Feed by source
The amendment, effective immediately upon filing on Nov. 3, 2026, applies to all users of Cboe BYX's Cboe One market data feed.
On November 3, 2026 Cboe BYX Exchange, Inc. filed a proposed rule change (Release No. 34-106854; File No. SR-CboeBYX-2026-041) to amend Rule 11.22(i). The notice, published November 9, 2026 in the Federal Register (Vol. 91, No. 218, pp. 73309-73312), states the change is effective immediately.
The amendment replaces the current itemized description of the Cboe One Feed with a source-based description. It identifies the Multicast Depth feeds of the Exchange, BZX, EDGA, and EDGX and the securities information processors (SIPs) as the two sources of the feed.
It also clarifies that the feed is offered in two versions - Cboe One Summary, which provides the aggregate best bid and offer across the four exchanges, and Cboe One Premium, which provides aggregated two-sided quotations at multiple price levels. The rule no longer lists individual data elements, message names, or the number of price levels.
The purpose is to allow future additions or modifications of data elements obtained from the identified sources without requiring a separate rule filing. The content of the feed, including execution information and consolidated market information, remains unchanged.
The SEC is soliciting comments on the proposal, which is filed under Section 19(b)(1) of the Securities Exchange Act of 1934 and Rule 19b-4.
Further reading