Long Call
The first options trade most people make, and the one most often done badly. Here is exactly what it pays, what it costs, and the three ways it loses even when you are right.
In short: a long call is the purchase of a call option. It gives the right to buy the underlying at the strike by expiry, so it profits when the underlying rises above the strike by more than the premium paid. The maximum loss is the premium; the upside is unlimited. It is the simplest bullish options position and, because it is also long time decay and long volatility exposure, it needs the move to be large, timely or accompanied by rising implied volatility to pay.
The intuition
Buying a call is buying a claim on the upside with a cap on what you can lose. If the index runs, the call runs with it, faster as it goes deeper into the money. If the index falls or drifts, the call loses value, but the loss stops at the premium. What you pay for that asymmetry is time: every day the move does not arrive, a slice of the premium evaporates. The trade is therefore a bet on magnitude and timing, not only on direction.
Payoff and formula
Profit at expiry = max(settlement price − strike, 0) − premium paid
Break-even = strike + premium
Maximum loss = premium × lot size; maximum gain = unlimited
Before expiry, the position's sensitivities are the option's delta (positive, between 0 and 1), gamma (positive), theta (negative: it costs money daily) and vega (positive: it gains if implied volatility rises).
Worked example (illustrative numbers)
Suppose NIFTY is at 24,000 with seven days to the Tuesday expiry and a trader buys one lot (65 units) of the 24,000 call at ₹150, a cost of ₹9,750. Break-even at expiry is 24,150.
| Nifty at expiry | Call worth | P&L per lot |
|---|---|---|
| 23,700 | 0 | −₹9,750 (maximum loss) |
| 24,000 | 0 | −₹9,750 |
| 24,150 | 150 | 0 (break-even) |
| 24,400 | 400 | +₹16,250 |
| 24,800 | 800 | +₹42,250 |
Now the same trade seen before expiry. Suppose that on Friday Nifty is up 100 points at 24,100 but implied volatility has slipped after a quiet RBI statement and three days have passed. With delta around 0.6, the rise is worth roughly ₹60; theta over three days has cost about ₹45; the volatility drop costs perhaps ₹15. The call trades at about ₹150: flat, after a 100-point move in the right direction. By Monday, with the index unchanged, it is worth less than it cost. The buyer needed either a bigger move or a faster one.
Why it matters to an options trader
- Defined risk. The premium is the whole exposure; there is no margin and no possibility of losing more. For a view with a specific catalyst it is the cleanest way to take the upside.
- Leverage with a deadline. ₹9,750 controls ₹15.6 lakh of index exposure in the example, but only until Tuesday. The deadline is the price of the leverage.
- A building block. Add a short call above it and it becomes a bull call spread with lower cost and capped gain; add a long put and it becomes a straddle; pair it with a short future and it becomes a synthetic put.
- The vega side. A long call bought when implied volatility is low has a second way to win: a rise in IV lifts the premium even before the index moves.
Common mistakes
- Buying far out-of-the-money because it is cheap. The move required is large and the whole premium is time value; most such calls expire worthless.
- Buying before an event without checking IV. The post-event IV crush can erase the gain from a correct directional call.
- Holding through the final sessions waiting for a bigger move. Theta is steepest then; a modest profit on Friday can become a loss by Tuesday.
- Sizing by premium rather than by delta. Ten cheap far calls can carry less effective exposure than one at-the-money call, and far more decay.
- Expecting point-for-point gains. Only a deep in-the-money call tracks the index closely; an at-the-money call moves about half as much at first.
Indian-market specifics
- Nifty calls can be bought on the weekly Tuesday expiry or on monthly, quarterly and half-yearly contracts; Bank Nifty and FinNifty calls are monthly only (last Tuesday). Sensex calls expire weekly on Thursday on BSE.
- Lot sizes after the January 2026 revision: Nifty 65, Bank Nifty 30, FinNifty 60, Midcap Select 120, Sensex 20; the premium times the lot is the full outlay.
- Index calls settle in cash at expiry; stock calls deliver shares if in the money, so a stock call held through expiry requires the cash to pay for the lot.
- Costs outside the premium: brokerage, exchange charges, GST, and Securities Transaction Tax of 0.15% on the premium when sold, or 0.15% of intrinsic value if the call settles in the money at expiry (rates from 1 April 2026).
FAQ
What is the maximum loss on a long call?
The premium paid plus costs; nothing more.
How is the break-even of a long call calculated?
Strike plus premium, at expiry.
Why can a long call lose money when the index rises?
Theta and falling implied volatility can outweigh a small or slow rise.
Long call or long futures for a bullish view?
The call caps risk and pays decay; the future has no decay and no cap. The deadline and risk budget decide.
Pick the strike with the numbers in front of you
The options calculator shows the premium, break-even and Greeks for any call; the option-chain pages show where call open interest is stacked above the market, the levels a rally has to clear. In the app, the strategy builder draws the payoff for any combination of legs.
Related terms
- Call Option, the instrument
- Put Option, the mirror trade
- Theta and Vega, the two forces besides direction
- Option strategies, the spreads built from a long call