Diurn
MIC codes / XIOM

XIOM

INDEX AND OPTIONS MARKET

CHICAGO, US · a segment of XCME

Trading days

Answered by the calendar of its operating MIC, XCME. The registry says this segment belongs to it.

Oct 2026
Nov 2026
Dec 2026
OpenWeekendClosedEarly closeOpen for some productsSofter: most markets also closedBeyond what we can answerToday

Hours on an ordinary day, America/Chicago time: 17:00–16:00 (+1) (from the day before)inferred (definition)

Coming up

Thu, 26 Nov 2026Thanksgiving Day17:00–12:00 (+1) (from the day before)Early close
Fri, 27 Nov 2026Day after Thanksgiving17:00–12:00 (+1) (from the day before)Early close
Thu, 24 Dec 2026Christmas Eve17:00–12:00 (+1) (from the day before)Early close
Fri, 25 Dec 2026Christmas DayClosed
Fri, 1 Jan 2027New Year's DayClosed

Recently

Mon, 7 Sept 2026Labor Day17:00–12:00 (+1) (from the day before)Early close

From the API

The same answers, live, for any date the calendar reaches. Asking whether a venue is open needs no key.

curl https://api.diurn.io/v1/venues/XIOM/status
curl "https://api.diurn.io/v1/venues/XIOM/sessions?from=2026-11-06&to=2027-01-07"

Registry record

ISO 10383, as published on 2026-10-12.

Operating MICXCME
TypeSGMT
Market nameINDEX AND OPTIONS MARKET
Market categoryNSPD
AcronymIOM
CountryUS
CityCHICAGO
WebsiteWWW.CME.COM
StatusACTIVE
Created2005-06-27
Last updated2005-06-27