MEMX Delays Options Trading Start to Sync with Stock Market
Published Date: 2/10/2025
Notice
Summary
MEMX is updating how it opens trading for most options starting right after 9:30 a.m. ET, waiting to see the first trade and price limits on the stocks behind those options. This change affects traders using MEMX options and aims to make opening trades smoother and more in sync with the market. The new rule is effective immediately, with no extra costs or delays expected.
Analyzed Economic Effects
1 provisions identified: 1 benefits, 0 costs, 0 mixed.
MEMX options opening timing change
If you trade options on MEMX, the Exchange will open most option series (other than index options) for trading only after 9:30 a.m. Eastern Time once it sees both: (1) the first disseminated trade on the option's primary listing stock and (2) the Limit Up-Limit Down (LULD) price bands from the Securities Information Processor (SIP). The change became operative upon filing on January 22, 2025, and the Exchange says no extra costs or delays are expected.
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Key Dates
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