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Nasdaq ISE Proposes Rule Change to Auction Mechanisms

The SEC published a notice of filing from Nasdaq ISE, LLC (File No. SR-ISE-2026-18, Release No. 34-105266) proposing amendments to various auction mechanisms under Options 3 and Options 3A. The rule change would permit orders for accounts of Market Makers assigned to an options class to be solicited for initiating orders submitted for execution against an agency order into a Facilitation Mechanism, Solicited Order Mechanism (SOM), Price Improvement Mechanism (PIM), FLEX PIM, or FLEX SOM. Cboe Exchange, Inc. received prior approval for identical rule amendments.

Nasdaq Harmonizes Options Market Data Feeds

The Nasdaq Stock Market LLC filed a proposed rule change with the SEC to harmonize options market data feeds with those of its affiliated exchanges Nasdaq ISE, LLC, Nasdaq PHLX, LLC, Nasdaq GEMX, LLC, and Nasdaq MRX, LLC. The change introduces two new data feeds (Order Feed and Trades Feed) and renames the existing ITTO feed to Depth of Market Feed, effective immediately upon filing with an operative date on or before August 2026.