What is quadruple witching?

Quadruple witching refers to the simultaneous expiry of four major derivatives contracts—stock options, stock index options, stock index futures, and single stock futures. The event takes place on the third Friday of March, June, September, and December and is often associated with increased trading activity and short-term market volatility.

Key points:

• Four derivatives contracts expire on the same day.
• Occurs 4 times each year.
• Common dates in 2026: March 20, June 19, September 18, and December 18.
• Typically results in higher trading volume as traders close, roll over, or adjust positions.
• Market volatility may increase due to large institutional and retail trading activity.
• Common trading approaches during this period include trend trading, scalping, news trading, and mean reversion.
• Historical examples show substantial increases in trading volume, including 1,400 crore (14 billion) shares traded on September 18, 2020.

Quadruple witching is one of the notable events observed in derivatives markets. As participation in financial markets continues to grow, investors and traders often encounter events that can influence trading volumes and market behaviour.

Among these events, quadruple witching attracts attention because multiple derivatives contracts expire simultaneously. This convergence of expiry dates can lead to increased market activity as participants adjust, close, or roll over their positions.

Understanding how quadruple witching works can help investors better interpret sudden increases in volume and short-term price fluctuations that may occur around these dates.

Quadruple witching takes place on the third Friday of March, June, September, and December every year.

The event is particularly important in U.S. and European markets, where derivatives trading volumes are substantial. Because large numbers of contracts expire simultaneously, trading activity often increases considerably.

In India, the concept is less prominent because derivatives contracts generally expire on the last Thursday of the month. If that Thursday is a market holiday, the expiry date shifts to the previous Wednesday.

Key quadruple witching dates

These dates are closely monitored by market participants because of the potential impact on trading volume and short-term price movements.

The simultaneous expiry of multiple derivatives contracts can create periods of heightened trading activity.

As traders close positions, settle contracts, or roll positions into future expiries, transaction volumes often increase significantly. This surge in activity can contribute to temporary market volatility.

Common market effects

• Higher trading volumes
• Increased price fluctuations
• Greater institutional participation
• Short-term liquidity changes
• Rapid intraday market movements

Historically, quadruple witching has been associated with significant trading activity rather than prolonged market direction changes. While price swings can occur, the most visible impact is often the increase in transaction volume.

The term “quadruple witching hour” is sometimes used to describe the final trading period before expiry, when activity may become particularly intense.

Different traders adopt different approaches depending on their objectives, risk tolerance, and market outlook.

The heightened activity associated with quadruple witching can create opportunities for traders who specialise in short-term market movements.

Scalping

Scalping involves executing multiple trades over short periods to capture small price movements.

Because quadruple witching often increases market activity, traders may find more opportunities to enter and exit positions quickly.

News trading

News traders focus on market reactions to economic developments, corporate announcements, or other significant events.

During quadruple witching, market sensitivity can increase, which may amplify reactions to new information and create additional trading opportunities.

Trend trading

Trend traders attempt to identify and follow prevailing market direction.

Periods of increased trading volume may strengthen short-term trends, allowing traders to align positions with observable market momentum.

Mean reversion

Mean reversion is based on the assumption that prices eventually move back toward their historical averages.

Sharp price swings during quadruple witching can create temporary deviations from average price levels, which some traders seek to exploit.

Several quadruple witching events have produced noticeable increases in market activity.

The following examples illustrate how trading volumes and market behaviour have responded during these periods.

These examples demonstrate how contract expirations can influence trading behaviour and increase overall market participation.

Quadruple witching occurs when stock options, stock index options, stock index futures, and single stock futures expire on the same day.

The event takes place on the third Friday of March, June, September, and December. Although it is most closely associated with U.S. and European markets, similar expiry-related activity can also influence other markets.

Investors and traders who understand quadruple witching can better interpret sudden increases in volume and volatility. Awareness of these market dynamics may help participants manage risk and make more informed trading decisions.