Cboe EDGX amends Rule 13.8(b) to define Cboe One Feed by source and version

The Securities and Exchange Commission published a notice that Cboe EDGX Exchange, Inc. filed a proposed rule change on November 3 2026 to amend Rule 13.8(b). The amendment revises the description of the Cboe Aggregated Market Feed (Cboe One) to reference the specific data sources from which its content is derived and to identify the feed's two versions, Summary and Premium.

Under the proposed language, the Cboe One Feed will be described as receiving information from the Multicast Depth feeds of the Exchange and its affiliated exchanges - BZX, BYX, and EDGA - and from the securities information processors (SIPs). The feed will be offered in two versions: Cboe One Summary, which provides the aggregate best bid and offer of all displayed orders across the four exchanges, and Cboe One Premium, which provides aggregated two-sided quotations for displayed orders on each exchange at multiple price levels.

The Exchange states that the change aligns its market data product description with the practice of other exchange groups, which describe aggregated feeds by source rather than by enumerating individual data elements, message types, or price-level counts. By defining the feed by source, future additions or modifications to data elements obtained from those sources will not require separate rule filings.

The amendment is effective immediately upon filing, as authorized by Section 19(b)(1) of the Securities Exchange Act of 1934. The notice, released under Release No. 34-106858 and File No. SR-CboeEDGX-2026-075 (FR Doc No. 2026-23103), solicits comments from interested parties. The five-level version of Cboe One Premium was sunset effective November 2 2026, and the feed now provides up to twelve price levels per side per exchange, a capability that has been available since May 4 2026.