Reference

OPEX Calendar

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

Last updated: Jul 20, 1:33 PM EDTRefreshes every 1 hour

Next OPEX

Friday, August 21, 2026

In 32 days · Monthly Options Expiration

Next 12 expirations

Date	Type	Description	Countdown
Fri, Aug 21	Monthly	Monthly Options Expiration	32 days
Fri, Sep 18	Monthly	Monthly Options Expiration	60 days
Fri, Oct 16	Monthly	Monthly Options Expiration	88 days
Fri, Nov 20	Monthly	Monthly Options Expiration	123 days
Fri, Dec 18	Monthly	Monthly Options Expiration	151 days
Fri, Jan 15	Monthly	Monthly Options Expiration	179 days
Fri, Feb 19	Monthly	Monthly Options Expiration	214 days
Fri, Mar 19	Monthly	Monthly Options Expiration	242 days
Fri, Apr 16	Monthly	Monthly Options Expiration	270 days
Fri, May 21	Monthly	Monthly Options Expiration	305 days
Fri, Jun 18	Monthly	Monthly Options Expiration	333 days
Fri, Jul 16	Monthly	Monthly Options Expiration	361 days

Fri, Aug 21Monthly

Monthly Options Expiration

In 32 days

Fri, Sep 18Monthly

Monthly Options Expiration

In 60 days

Fri, Oct 16Monthly

Monthly Options Expiration

In 88 days

Fri, Nov 20Monthly

Monthly Options Expiration

In 123 days

Fri, Dec 18Monthly

Monthly Options Expiration

In 151 days

Fri, Jan 15Monthly

Monthly Options Expiration

In 179 days

Fri, Feb 19Monthly

Monthly Options Expiration

In 214 days

Fri, Mar 19Monthly

Monthly Options Expiration

In 242 days

Fri, Apr 16Monthly

Monthly Options Expiration

In 270 days

Fri, May 21Monthly

Monthly Options Expiration

In 305 days

Fri, Jun 18Monthly

Monthly Options Expiration

In 333 days

Fri, Jul 16Monthly

Monthly Options Expiration

In 361 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.