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VCM Enhancements Initiative

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Video updated as of 11 May 2020

HKEX concluded in December 2019 to enhance the Pre-Opening Session (POS) and Volatility Control Mechanism (VCM) in its securities market.  The VCM enhancements covers expanded stock coverage, tiered triggering thresholds and allowing multiple triggers in a later phase to further reduce risks caused by individual stocks’ price volatility, reflecting changes in international practice and regulatory guidance.  This page focuses on the implementation details of the VCM enhancements.

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Updated 29 Jun 2020