Are VIXW options PM-settled like SPXW?

External question — Personal Finance Stack Exchange Author: Laith Original post: https://money.stackexchange.com/questions/150625 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. Cboe explicitly defines the difference between the options on SPX as AM-settlement and SPXW as PM-settlement, but for VIX and VIXW, they say they're both AM-settled. I can see in my trading platform that VIXW options expiring today are still actively traded. Why is that? How can an AM-settled option continue to trade the day of expiration? Unless it's PM-settled and I missed fine-print somewhere?