Index futures and options horizons

Three products can all give an investor the Nifty. They cannot all be held for the same length of time.

An index future and an index option are contracts. Each has an expiry date written into it. The workbook puts the usable horizon at a few days up to a maximum of 3 months. Long dated options are also available, but that is the exception it notes, not the norm.

An index fund is not a contract. It is an actual investment in the securities of the index. The workbook says it can be held for a very long tenure, or for a lifetime.

That difference decides which product fits which job. A derivative is for a view over weeks. A fund is for a goal over decades.

Roll a future every three months for twenty years and you pay the interest cost of a delayed purchase every single time. Buy the index fund once and you pay a management charge instead.

Section 19.2.10 compares the three on three parameters. This is the whole table.

Three things are worth pulling out of it.

The 3 month ceiling is a horizon, not a rule of the exchange. It reflects the contracts that carry meaningful liquidity. A holder who wants exposure beyond it has to roll, and each roll is a fresh transaction with fresh costs.

Cost is the discriminator, and the option is the dearest. The future carries only the interest cost of deferring the purchase. The option carries that plus a premium, and the workbook says why: exercise is at the buyer's discretion, so somebody has to be paid for granting that choice.

Risk is asymmetric only for the option buyer. A long future has the same risk as owning the index fund. A long option cannot lose more than the premium paid. The fund carries the risk of the underlying securities and nothing else.

The workbook runs exactly the same three-parameter comparison for gold in section 19.2.11, where gold futures get a 12 month horizon against the index future's 3 months.

Mr Sahni wants Rs 25,00,000 of Nifty exposure for his daughter's education, which is 9 years away. He asks whether to use futures, options or a fund.

The derivative route. The index future has a horizon of at most 3 months. Over 9 years that is roughly 36 rolls. Each roll is a fresh interest cost on the delayed purchase and a fresh set of transaction costs. Nothing in the contract carries him to year 9; he has to keep re-entering.

The option route. Buying a call instead caps his downside at the premium. Suppose the premium is Rs 62,500, which is 2.5% of the notional Rs 25,00,000 for a three-month contract. His maximum loss on that contract is exactly Rs 62,500. But repeat it quarterly for 9 years and the premiums alone come to 36 x Rs 62,500 = Rs 22,50,000 — near the whole exposure he was trying to obtain. The figure is illustrative, but the arithmetic of repeated premium payment is the workbook's own point about the risk premium.

The fund route. The index fund has no expiry. He buys once and holds for the full 9 years, paying the AMC's management charge along the way and taking the risk of the underlying securities.

The answer the comparison forces. For a 9-year goal the horizon column alone decides it. A product with a 3-month maximum horizon is the wrong instrument for a 9-year need, whatever its cost or risk profile looks like in isolation.

Chapter 19 (Comparison of Products across categories), section 19.2.10 — Index Futures versus Index Options versus Index Funds. It is a three-row table, which is exactly why it gets asked: every cell is a potential one-mark question.

Expect the horizon figure directly (a few days to a maximum of 3 months), the cost distinction (interest cost for a future, interest cost plus a risk premium for an option), and the maximum-loss statement for an option buyer (the premium paid). The paired question sets it against section 19.2.11, where gold futures carry a 12 month horizon.

• 3 months is the index derivative horizon; 12 months is the gold futures horizon. The two tables sit on facing pages and the figures get swapped.
• Long dated options exist. The workbook notes them as an exception to the 3 month maximum for options, and does not extend the same note to futures.
• The index future has the same risk as the index fund, per the workbook. It is the option, not the future, that caps the buyer's loss.
• An index future is not cost-free because no premium is paid. Its cost is the interest on the delayed purchase, and that cost recurs on every roll.
• The fund can be held for a lifetime because it is an actual investment. A derivative is a contract with an expiry date, and that is the structural reason for the difference, not a matter of preference.
• Do not confuse this table with the options-on-futures product taught in the commodity derivatives papers. Section 19.2.10 is about how long an index exposure can be held, not about an option whose underlying is a futures contract.