Call Option

A call option is a Derivative contract that gives the buyer the right (but not the obligation) to purchase the underlying asset (stock, index, commodity) at a predetermined strike price on or before the expiry date. The buyer pays a premium to the seller (writer) for this right.

In India, options are traded on the NSE in two styles: European (exercisable only at expiry — this applies to all index options like Nifty and Bank Nifty) and American (exercisable any time before expiry — this applies to stock options). Most option trading in India is of the European style on the Nifty 50 index.

Consider this example: Nifty 50 is at 22,000. You buy a 22,200 CE (Call European) expiring in 2 weeks for Rs 100 premium. The lot size is 25 units, so your total cost is Rs 2,500 (25 x Rs 100). If Nifty rises to 22,500 at expiry, your option is worth Rs 300 (22,500 - 22,200), giving a profit of Rs 200 per unit or Rs 5,000 total — a 100% return on Rs 2,500 investment. If Nifty stays below 22,200 at expiry, the option expires worthless and you lose the entire Rs 2,500 premium.

Call options are used for three primary purposes: directional speculation (betting on upside with limited risk), hedging (protecting a short futures position), and income generation (selling covered calls against stock holdings). In India, weekly expiry options on Nifty (every Thursday) and Bank Nifty (every Wednesday) have created a massive speculative market, with daily notional turnover exceeding Rs 100 lakh crore.

SEBI has progressively tightened F&O regulations due to concerns about retail losses. Studies show that 90% of individual option traders lose money. The new lot sizes (effective November 2024) increased the minimum contract value to Rs 5-10 lakh, the weekly expiry options were reduced to one per exchange, and upfront margin requirements have been increased. Understanding Greeks (Delta, Gamma, Theta, Vega) is essential before trading options.