Triple Witching
The quarterly Friday when index futures, index options, and stock options all expire together — third Friday of March, June, September, and December.
What is Triple Witching?
Triple witching is the simultaneous quarterly expiration of index futures, index options, and single-stock options on the third Friday of each quarter-end month. The overlap forces enormous position unwinds and rebalancing flows through the market in a single session — some of the year’s highest-volume days.
How Triple Witching works
For futures traders the practical event happens earlier: liquidity migrates from the expiring quarterly (H/M/U/Z) to the next contract during roll week, roughly eight days before expiration. On the day itself, opening and closing auctions swell with benchmark-linked flow, and price frequently gravitates toward heavy open-interest strikes (“pinning”) into the close.
Worked example
It’s the Wednesday before June triple witching, and a trader notices ESM volume draining while ESU builds. They roll their charts and positions to the September contract — trading the expiring June contract into Friday means progressively worse fills in a dying book.
Triple Witching vs related concepts
Side-by-side comparison of Triple Witching against the most commonly confused alternatives.
| Concept | Definition | Category |
|---|---|---|
| Triple Witching this term | The quarterly Friday when index futures, index options, and stock options all expire together — third Friday of March, June, September, and December. | News & Events |
| Expiration | The date a futures contract terminates — at which point all open positions either physically deliver or cash-settle, depending on contract specifications. | Futures Mechanics |
| Contract Rollover | The process of closing a near-expiration futures contract and opening an equivalent position in the next contract month — required to maintain exposure beyond a single contract's lifecycle. | Futures Mechanics |
| Front Month | The nearest-to-expiration futures contract month with active trading — typically the most liquid contract, where the vast majority of volume and open interest concentrates. | Futures Mechanics |
Why traders fail Triple Witching
Trading the expiring contract through roll week. Check volume by contract month and follow it. Reading witching-day moves as trend signals — much of the session’s motion is mechanical hedging flow that reverses the following week; it’s a day for reduced conviction, not breakout chasing.
Frequently asked questions about Triple Witching
When is triple witching?
The third Friday of March, June, September, and December — when index futures, index options, and stock options expire simultaneously.
Should you trade on triple witching days?
Cautiously. Volume is huge but much of the movement is mechanical expiration flow. Futures traders should already be in the next quarterly contract by then via the roll.