Uses of Index Futures

Index futures are standardized contracts traded on recognised exchanges (e.g., NSE) that obligate the buyer to purchase, and the seller to deliver, the value of a specific stock index (such as NIFTY 50) at a predetermined price on a future date.

Unlike stock futures, which are linked to a single equity, index futures represent a basket of stocks, making them a pure cash‑settled instrument; physical delivery of the underlying stocks never occurs.

For the NISM exam, remember that the contract size is expressed in rupees per index point (e.g., Rs 10 per point for NIFTY). This detail is frequently asked in calculation‑type questions.

• Key feature – cash settlement based on the closing value of the index on expiry.
• Standardised expiry – typically the last Thursday of the contract month.

Market participants employ index futures for four main purposes: hedging against adverse movements in a portfolio, speculation to profit from expected index moves, arbitrage to exploit price differentials between the futures and the spot market, and portfolio management to adjust the beta exposure without buying or selling the underlying stocks.

Each use aligns with a distinct risk‑return profile. Hedgers seek to reduce risk, speculators accept risk for potential high returns, arbitrageurs aim for risk‑free profit, and portfolio managers use futures to fine‑tune exposure efficiently.

Exam questions often present a scenario (e.g., a mutual fund manager worried about a market dip) and ask which instrument best fits the need. Recognising the purpose‑instrument match is essential for scoring marks.

Hedging involves taking an opposite position in index futures to offset potential losses in a physical equity portfolio. For example, if a portfolio mirrors the NIFTY 50 and the manager anticipates a short‑term market correction, selling NIFTY futures locks in the current market value.

The hedge ratio is typically calculated as the portfolio's beta multiplied by the portfolio value divided by the contract value. A beta of 1 means a one‑to‑one hedge; a beta different from 1 requires scaling the number of contracts.

In the exam, you may be asked to compute the number of contracts needed for a given portfolio value and beta. Knowing the contract size (Rs 10 per point) and the index level is vital for accurate calculations.

• Benefit – reduces downside risk without liquidating the underlying holdings.
• Limitation – may incur margin costs and basis risk if the index and portfolio do not move perfectly together.

Speculators use index futures to profit from anticipated index movements without committing the full capital required to buy the underlying stocks. Because futures require only a margin (often 10‑15% of the contract value), the effective leverage can be 6‑10 times the invested amount.

While leverage amplifies gains, it equally magnifies losses. A 2% adverse move in the index can wipe out the entire margin, leading to a margin call. The NISM exam frequently tests the concept of leverage by asking about the impact of a price move on the margin amount.

Key exam tip: always relate the percentage move in the index to the percentage change in the margin, not to the full contract value.

Arbitrageurs exploit price mismatches between the index futures price and the theoretical fair value derived from the spot index, cost of carry, and interest rates. Two classic strategies are cash‑and‑carry arbitrage and reverse cash‑and‑carry arbitrage.

In cash‑and‑carry, the futures price is higher than the fair value. The trader buys the underlying basket (or an ETF replicating the index) and simultaneously sells the futures, locking in a risk‑free profit at expiry.

Reverse cash‑and‑carry works when the futures price is below the fair value. The trader sells the underlying (or shorts an ETF) and buys the futures, again earning a guaranteed return after settlement.

Asset managers use index futures to quickly adjust the overall market exposure (beta) of a portfolio. By adding or reducing futures contracts, they can increase or decrease the portfolio's sensitivity to market movements without trading each constituent stock.

This technique is especially useful during rebalancing or when implementing tactical asset allocation strategies. For instance, a fund may raise its beta from 0.8 to 1.2 by buying additional futures contracts.

Exam questions may present a portfolio value, current beta, and target beta, asking for the number of contracts required. Remember to use the contract size and current index level to convert the required notional exposure into contract count.

SEBI mandates that all index futures traded on recognised exchanges must adhere to a minimum margin requirement, daily mark‑to‑market (MTM) settlement, and a standardized expiry schedule (the last Thursday of the contract month). Violation of margin rules leads to a forced square‑off by the exchange.

Margin is posted in cash and is recalculated each trading day based on price movements. The MTM process ensures that gains and losses are realised daily, preventing the accumulation of large, undisclosed exposures.

For the exam, remember that the term “premium” is not used for futures; instead, the focus is on “margin” and “MTM”. Questions may ask which of the following is NOT a feature of index futures – the correct answer will be any statement referring to premium or physical delivery.

Advantages of index futures include high liquidity, low transaction costs, ability to gain instant market exposure, and efficient portfolio beta management. They also enable traders to implement sophisticated strategies such as spread trading and calendar spreads.

Limitations involve basis risk (the futures price may not move perfectly with the underlying index), the need for continuous margin monitoring, and the risk of large losses due to leverage. Moreover, regulatory changes can affect margin requirements, impacting strategy profitability.

Exam takers should be able to list at least two advantages and two limitations and identify which scenario each applies to.