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CalendarSPX · SPY · QQQ 0DTEverified 2026-09-26

0DTE event days, Q4 2026

A dated list of the scheduled days that move 0DTE index options — FOMC statements, CPI releases, monthly OPEX and early closes — each with its primary source. After each day passes, the per-session archive pages for SPX, SPY and QQQ show the official close vs max pain, walls, and implied vs realized for that date.

n < 5 event days in the archive: no event-day statistics yet — we publish the per-session numbers and will add comparisons only once at least five of each kind are in.

Event dates last verified 2026-09-26 from federalreserve.gov, bls.gov, cboe.com and nyse.com · 15-min delayed CBOE data on every session page

Simulator SPX

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Scheduled Q4 2026 event days, each with its primary source
DateDayEventWhat the archive will showSource
2026-10-14WednesdayCPI CPI release, 8:30am ET (September 2026 data)SPX/SPY/QQQ session pages after the close on 2026-10-14www.bls.gov
verified 2026-09-26
2026-10-16FridayMonthly OPEX Monthly OPEX (third Friday; AM-settled SPX + PM-settled SPXW, ETF options)SPX/SPY/QQQ session pages after the close on 2026-10-16cdn.cboe.com
verified 2026-09-26
2026-10-28WednesdayFOMC FOMC statement (2:00pm ET) + press conference
two-day meeting Oct 27-28; decision day is the second day		SPX/SPY/QQQ session pages after the close on 2026-10-28www.federalreserve.gov
verified 2026-09-26
2026-11-10TuesdayCPI CPI release, 8:30am ET (October 2026 data)SPX/SPY/QQQ session pages after the close on 2026-11-10www.bls.gov
verified 2026-09-26
2026-11-20FridayMonthly OPEX Monthly OPEX (third Friday; AM-settled SPX + PM-settled SPXW, ETF options)SPX/SPY/QQQ session pages after the close on 2026-11-20cdn.cboe.com
verified 2026-09-26
2026-11-27FridayEarly close Early close 1:00pm ET - 0DTE settles at 1:00pm
day after Thanksgiving		0DTE settles at 1:00pm ET; the archive's close is the 1:00pm official close. SPX/SPY/QQQ session pages after the close on 2026-11-27www.nyse.com
verified 2026-09-26
2026-12-09WednesdayFOMC FOMC statement (2:00pm ET) + press conference + Summary of Economic Projections
two-day meeting Dec 8-9; decision day is the second day		SPX/SPY/QQQ session pages after the close on 2026-12-09www.federalreserve.gov
verified 2026-09-26
2026-12-10ThursdayCPI CPI release, 8:30am ET (November 2026 data)SPX/SPY/QQQ session pages after the close on 2026-12-10www.bls.gov
verified 2026-09-26
2026-12-18FridayMonthly OPEX Monthly OPEX (third Friday; AM-settled SPX + PM-settled SPXW, ETF options)SPX/SPY/QQQ session pages after the close on 2026-12-18cdn.cboe.com
verified 2026-09-26
2026-12-24ThursdayEarly close Early close 1:00pm ET - 0DTE settles at 1:00pm
Christmas Eve		0DTE settles at 1:00pm ET; the archive's close is the 1:00pm official close. SPX/SPY/QQQ session pages after the close on 2026-12-24www.nyse.com
verified 2026-09-26

Quick answers

What happens to SPX 0DTE on FOMC day?

The FOMC statement is released at 2:00pm ET; 0DTE contracts expiring that day trade until 4:00pm ET for SPXW and 4:15pm ET for SPY and QQQ. After the close, the session archive shows the official close vs max pain for that date. No FOMC-day statistic until n ≥ 5.

What about CPI day?

CPI is released at 8:30am ET, before the 9:30am open. The 9:00 ET levels page for that date captures the pre-open positioning: max pain, walls and the ATM straddle.

Is monthly OPEX different from a normal 0DTE day?

AM-settled SPX monthlies settle on the opening print; PM-settled SPXW and the ETF options settle on the close. The archive's 0DTE slice is the PM-settled contracts — see what happens when SPX expires in the money.

What changes on an early-close day?

The market closes at 1:00pm ET and 0DTE contracts settle on that close. User-set 3:30/3:45/3:50 checks are shifted relative to the 1:00pm close — the simulator runs your strike against that close.

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