Call Option
A Call Option is a financial contract that gives the buyer the right — but not the obligation — to buy an underlying asset at a predetermined price (the strike) on or before a fixed expiry date. The buyer pays an upfront premium for this right. Indian retail traders use call options on Nifty, Bank Nifty and stock derivatives to take leveraged bullish bets with defined risk.
Key takeaways:
- A call gives the buyer the right to buy at a fixed strike price by expiry.
- Maximum loss for the buyer = premium paid; maximum profit is theoretically unlimited.
- Used to take bullish positions with capped downside and high leverage.
- Premium increases with time to expiry, volatility and the underlying’s strength.
- Options can be settled in cash (index) or via physical delivery (stocks).
How a call option works
Suppose Nifty is at 22,000 and you expect it to rise. You buy a 22,000-strike call expiring in two weeks at a premium of ₹120. Lot size is 25. Your total cost is 25 × ₹120 = ₹3,000. If Nifty rises to 22,400 by expiry, the call is worth at least ₹400. You earn (₹400 − ₹120) × 25 = ₹7,000 profit. If Nifty stays at or below 22,000, the option expires worthless and you lose the ₹3,000 premium.
Key components of a call
- Underlying: The asset the call is on — Nifty, a stock, currency, commodity.
- Strike price: The agreed purchase price.
- Expiry: Final date the option can be exercised — weekly or monthly in India.
- Premium: Cost paid by the buyer; received by the seller.
- Lot size: Number of units per contract — set by the exchange.
In/At/Out of the money
| Spot vs strike | Status | Implication |
|---|---|---|
| Spot > Strike | In the money (ITM) | Has intrinsic value |
| Spot ≈ Strike | At the money (ATM) | Highest time value |
| Spot < Strike | Out of the money (OTM) | Pure time value; cheaper |
Why traders buy calls
- To take leveraged bullish bets with limited downside.
- To hedge a short position in the underlying.
- To gain exposure ahead of expected catalysts (earnings, news, RBI events).
- To define risk in volatile markets.
Risks for buyers
Even if the underlying moves in the expected direction, time decay (Theta) and volatility crush (Vega) can erode the premium. A call can lose value over days even with a sideways move in the underlying. Always be aware of expiry timing and implied volatility levels before entering a long-call trade.
Indian market specifics
Index options (Nifty, Bank Nifty, FinNifty, Sensex) are cash-settled. Stock options are physically settled if held to expiry — meaning ITM positions deliver shares. Margin requirements for buyers are simply the premium; sellers face SPAN + Exposure margins. Weekly expiries (every Thursday/Wednesday) are extremely liquid and a favourite for short-duration trades.
Frequently asked questions
What happens if I let a call expire worthless?
You lose the entire premium paid. No further obligations.
Can I exercise an Indian option early?
No — Indian listed options are European-style and exercise only at expiry.
Do I need a special account for options?
You need an F&O segment enabled on your demat/trading account.
How does Lemonn charge for option trades?
Lemonn charges a flat per-order brokerage on F&O trades; statutory charges (STT, exchange fees, GST) apply on top.
