Calls, puts and how options really work.
Options are contracts that give the right — but not the obligation — to buy or sell an asset at a set price before a set date. Used wisely they manage risk; used carelessly they destroy capital.
A call option gives the right to buy at the strike price; its buyer profits if the price rises. A put option gives the right to sell at the strike; its buyer profits if the price falls. The buyer pays a premium for this right, and that premium is the maximum the buyer can lose.
| Term | Meaning |
|---|---|
| Strike price | The fixed price at which the option can be exercised |
| Premium | The price you pay (or receive) for the option |
| Expiry | The date the contract ends |
| In the money | The option currently has intrinsic value |
| Lot size | Options trade in fixed quantities, not single shares |
Beginners are usually best served by defined-risk strategies. A protective put is like insurance: you hold a stock and buy a put, capping your downside if the price falls. A covered call means selling a call against stock you already own to earn premium income, in exchange for giving up some upside. Both have clearly understood risk, unlike naked option selling, which can lose far more than the premium received.
Two forces beyond price direction drive an option's value. Time decay means an option steadily loses value as expiry nears — time works against the buyer and for the seller. Volatility inflates premiums when the market expects big moves and deflates them when it is calm. Many beginners are right about direction yet still lose, because decay and falling volatility eat the premium.
An option's premium has two parts. Intrinsic value is the real, in-the-money worth — how far the strike is beyond the current price in your favour. Time value is the extra you pay for the chance that the option moves further into profit before expiry. Time value erodes to zero by expiry, which is why an option can be "right" on direction yet still lose money.
WATCH OUT · Options can expire worthless. Most option-buying beginners lose money because options lose value as expiry approaches (time decay). Start by understanding a single strategy thoroughly, and never risk more premium than you can afford to lose entirely.
Ready to practise this? Open a Demat & trading account with Aditya Trading Solutions — low brokerage, pro charting, 24×7 support. More free guides at adityatrading.in/EBooks.
Educational use only. Published by ATS Share Brokers Pvt. Ltd. (SEBI Regn. INZ000205136). Not investment advice or a recommendation to buy or sell any security. Trading and investing carry a high risk of loss; patterns and strategies can fail and past performance does not indicate future results. Consult a SEBI-registered adviser before trading.
They can be, because of leverage and time decay — option buyers can lose the entire premium. Used for hedging or with defined-risk strategies, they can actually reduce risk.
An option steadily loses value as expiry approaches, all else equal. This works against buyers and in favour of sellers.
Defined-risk strategies such as a protective put or a covered call, where the maximum loss is known in advance. Avoid naked option selling until experienced.