Reference

OPEX Calendar

Upcoming US options expiration dates. Monthly OPEX (3rd Friday) and quarterly Triple Witching at a glance.

Last updated: Sep 13, 12:00 PM EDTRefreshes every 1 hour

Next OPEX

Friday, September 18, 2026

In 5 days · Monthly Options Expiration

Next 12 expirations

Date	Type	Description	Countdown
Fri, Sep 18	Monthly	Monthly Options Expiration	5 days
Fri, Oct 16	Monthly	Monthly Options Expiration	33 days
Fri, Nov 20	Monthly	Monthly Options Expiration	68 days
Fri, Dec 18	Monthly	Monthly Options Expiration	96 days
Fri, Jan 15	Monthly	Monthly Options Expiration	124 days
Fri, Feb 19	Monthly	Monthly Options Expiration	159 days
Fri, Mar 19	Monthly	Monthly Options Expiration	187 days
Fri, Apr 16	Monthly	Monthly Options Expiration	215 days
Fri, May 21	Monthly	Monthly Options Expiration	250 days
Fri, Jun 18	Monthly	Monthly Options Expiration	278 days
Fri, Jul 16	Monthly	Monthly Options Expiration	306 days
Fri, Aug 20	Monthly	Monthly Options Expiration	341 days

Fri, Sep 18Monthly

Monthly Options Expiration

In 5 days

Fri, Oct 16Monthly

Monthly Options Expiration

In 33 days

Fri, Nov 20Monthly

Monthly Options Expiration

In 68 days

Fri, Dec 18Monthly

Monthly Options Expiration

In 96 days

Fri, Jan 15Monthly

Monthly Options Expiration

In 124 days

Fri, Feb 19Monthly

Monthly Options Expiration

In 159 days

Fri, Mar 19Monthly

Monthly Options Expiration

In 187 days

Fri, Apr 16Monthly

Monthly Options Expiration

In 215 days

Fri, May 21Monthly

Monthly Options Expiration

In 250 days

Fri, Jun 18Monthly

Monthly Options Expiration

In 278 days

Fri, Jul 16Monthly

Monthly Options Expiration

In 306 days

Fri, Aug 20Monthly

Monthly Options Expiration

In 341 days

Dates auto-update at most once per hour. All dates shown in UTC reference; local market settlement is at the close on the listed date (US Eastern Time).

What is OPEX?

OPEX is short for options expiration — the day when listed options contracts stop trading and either get exercised or expire worthless. In US equity markets, monthly options on stocks and ETFs expire on the third Friday of every month. Quarterly options, plus index futures and equity index options, all align on the third Friday of March, June, September, and December — a setup traders call Triple Witching.

Why traders care about OPEX dates

Volume spikes. Hedge unwinds, position rolls, and pin risk drive outsized volume in the last hour of trading on OPEX day.
Pin risk. Heavy open interest at specific strikes can magnetize the underlying price toward those strikes through expiration.
Volatility regime change. Implied vol often resets after OPEX as dealer hedging unwinds. Some traders intentionally stay flat into OPEX week.
Triple Witching is bigger. Quarterly OPEX involves three derivatives expiring at once, with substantially higher volume and more aggressive rebalancing flows. Worth marking on the calendar.

How these dates are calculated

Pure date math — no API calls. Monthly OPEX is the third Friday of each month. Quarterly OPEX is the last Friday of March, June, September, and December (which always falls on the third Friday under current US listing rules). Holiday-shifted exchange closures can occasionally move expiration to Thursday — verify against your broker for any date that touches a major holiday week.

Reference data only. Verify against your broker, exchange, or OCC publications for any date that requires precision (especially around holidays and exchange schedule changes).

MiyagiTrades tools are provided for educational and informational purposes only. They do not provide financial advice, trading signals, brokerage services, or trade execution. Verify all calculations against your broker, exchange, or trading platform before placing trades.