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Market regulation · 02/09/2004Updated: 10/17/2026 · 1 min read

Chicago Board Options Exchange, Inc. Seeks Immediate Approval for New Rule Affecting Options Index Calculations

Summary

The Chicago Board Options Exchange, Inc. has filed a proposed rule change with the relevant regulatory body, aiming to update the calculation methods for securities indexes underlying options, with the goal of enhancing market efficiency and transparency.

Original source language: Federal Register — SECOpen original release →

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