15. Significance of the Futures Expiry Date

What is the Futures Expiry Date?

In futures trading, every contract comes with a predefined time frame. The expiry date is the last day a futures contract is valid for trading. After this date, the contract is compulsorily settled by the exchange through cash or physical settlement.

• For NSE stock and index futures, monthly expiry is on the last Tuesday of every month.
• If that day is a trading holiday, expiry happens on the previous working day.

The expiry date is not just a calendar deadline—it impacts pricing, liquidity, trader behaviour, and settlement mechanics across the derivatives market.

Why is the Expiry Date So Important?

1. Settlement of Contracts

On expiry, all open positions are closed by the clearing corporation:

• Cash settlement → Price difference is credited or debited
• Physical settlement → Shares are delivered (for stock futures)

If a trader does not exit before expiry, they are automatically settled as per exchange rules.

2. Defines the Life of a Contract

Each futures contract has a limited duration. Once the expiry date arrives, that specific contract ceases to exist.

• Traders can choose between near-month, mid-month, or far-month contracts depending on their horizon.

Example:

• In April:
• Near-month → April contract
• Mid-month → May contract
• Far-month → June contract

3. Price Convergence

As expiry approaches, the futures price tends to converge with the spot price of the underlying asset.

Example:

• Spot Nifty = 22,200
• Futures Nifty = 22,250 (one week before expiry)
• By expiry → Futures price converges to 22,200

4. Triggers Rollover Activity

Traders with long-term views often roll over their positions near expiry:

• Square off the current month’s contract
• Take a new position in the next month’s contract

Analysts also track rollover data to gauge market sentiment.

5. Impacts Market Volatility and Liquidity

As expiry approaches:

• Liquidity increases due to heavy volumes
• Volatility rises as traders exit or roll positions
• Arbitrage and hedging strategies are actively adjusted

What Happens If a Trader Doesn't Act Before Expiry?

• The position is automatically settled
• In stock futures, physical settlement may require delivering or receiving shares
• Additional transaction charges, taxes, or delivery margins may apply

Example: How Expiry Works in Practice

A trader buys 1 lot of Reliance Futures (250 shares) at ₹2,800 in the April contract. Expiry is April 25.

Case 1: Trader exits before expiry

• On April 24, they sell at ₹2,860
• Profit = ₹60 × 250 = ₹15,000

Case 2: Trader does nothing

• On April 25, position is auto-settled at closing price ₹2,790
• Loss = ₹10 × 250 = ₹2,500

Common Trader Actions Near Expiry

Contract Lifecycle: Visual Timeline

Each month, a new contract is introduced and the far-month contract expires three months later.

Price Behaviour Around Expiry

• Futures often trade at a premium to spot in the early part of the contract
• As expiry nears, premium narrows → Futures align with spot price
• This convergence ensures fair hedging and settlement

Impact on Institutions and Retail Traders

• Institutions: Use complex expiry strategies like calendar spreads, rollovers, and arbitrage
• Retail traders: Must track expiry dates to avoid forced settlement or additional costs
• Expiry Day: Known for sharp price moves and heavy intraday volumes

Key Takeaways

• Expiry is the final trading day of a futures contract
• All positions must be squared off, rolled over, or settled
• Expiry drives price convergence, liquidity, and volatility
• Failing to act can lead to forced settlement or delivery obligations