Cboe Tweaks Trading Rules in Latest SEC Filing Snooze
Published Date: 11/24/2025
Notice
Summary
Cboe Exchange is updating its rules to let traders buy and sell options on the new Magnificent 10 Index during both regular and extended trading hours. This change means more chances to trade and react to market moves throughout the day. The update is effective immediately, so traders can jump in right away without any extra fees or delays.
Analyzed Economic Effects
3 provisions identified: 3 benefits, 0 costs, 0 mixed.
MGTN Options Trade During Extended Hours
The Exchange will permit options on the Cboe Magnificent 10 Index (MGTN) to trade during Global Trading Hours (GTH) and Curb Trading Hours in addition to Regular Trading Hours. GTH are from 8:15 p.m. (previous day) to 9:25 a.m., Monday through Friday, and Curb is from 4:15 p.m. to 5:00 p.m., Monday through Friday.
FLEX MGTN Options Eligible During Extended Hours
If the Exchange designates MGTN options for GTH or Curb, FLEX options with the same MGTN underlying are also deemed eligible to trade during those sessions. The rule amendment adds MGTN to the list of products eligible for GTH and Curb.
TPHs May Elect to Trade MGTN in Extended Sessions
All Trading Permit Holders (TPHs) will be able, but are not required, to trade MGTN options during GTH and Curb if the Exchange lists the product for those sessions. The rule simply extends permissible trading hours for a product that will trade during Regular Trading Hours.
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