Federal Register #SR-CBOE-2026-045

SEC Notice of Proposed Rule Changes for Silexx Stock Loan Functionality and DTC Rule Amendments

This notice details proposed rule changes affecting financial market infrastructure and trading platforms: - Government Buyer: - Securities and Exchange Commission (SEC) - OEMs and Vendors: - Cboe Exchange, Inc. (operator of Silexx trading platform) - The Depository Trust Company (DTC) - Products/Services Requested: - Real-time broker stock loan inventory functionality for Silexx - Enables Silexx users to view and request stock loans in real-time - Automatically populates locate IDs for short sale orders - Enhances compliance with Regulation SHO - Amendment to DTC Rules to align with Rule 17ad22(e)(19) - Permits DTC to inspect books, records, and information related to indirect participants - Improves risk management and regulatory compliance - Unique or Notable Requirements: - Silexx platform must support FIX connectivity for real-time inventory visibility - Functionality targets hard-to-borrow securities and short sale workflow efficiency - DTC rule change focuses on indirect participant risk monitoring - No specific product part numbers or purchase quantities are requested, as this is a regulatory notice rather than a procurement opportunity. - Places of Performance and Delivery: - SEC offices in Washington, DC - Federal Register location

Description

The Securities and Exchange Commission (SEC) has issued a notice regarding a proposed rule change by Cboe Exchange, Inc. to adopt a stock loan inventory functionality for Silexx, a trading platform. This functionality will provide real-time broker stock loan inventory access, enhancing the efficiency of short sale order processing by allowing users to view available securities to borrow and automatically populate locate IDs. The change aims to streamline the short sale process, particularly for hard-to-borrow securities, and is filed as a non-controversial rule change effective immediately upon filing. The SEC invites comments on the proposal, which is intended to benefit investors and the marketplace by facilitating compliance with Regulation SHO requirements.

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