Call option = right to buy stock at fixed price by expiration date. Put option = right to sell stock at fixed price by expiration date.
Both are “rights, not obligations” you choose whether to exercise.
Call Options: Betting On Price Rising
Buy TCS call: strike ₹4,000, premium ₹100, expires end of month.
If TCS rises to ₹4,500:
Exercise = buy at ₹4,000, sell at ₹4,500 = ₹500 profit minus ₹100 premium = ₹400 net.
If TCS stays at ₹3,900:
Don’t exercise. Lose only ₹100 premium.
Put Options: Betting On Price Falling
Buy HDFC put: strike ₹2,000, premium ₹50, expires end of month.
If HDFC crashes to ₹1,500:
Exercise = sell at ₹2,000, buy at ₹1,500 = ₹500 profit minus ₹50 premium = ₹450 net.
If HDFC stays at ₹2,200:
Don’t exercise. Lose only ₹50 premium.
Key Terms
Strike Price: Fixed price written in contract.
Premium: Fee paid upfront to buy option. Non-refundable.
Expiration Date: Last Thursday monthly for standard options, weekly Thursdays for NSE weeklies. After this = contract expires worthless.
In-The-Money: Call profitable when stock > strike price. Put profit when stock < strike price.
Why Retail Traders Get Destroyed
Time decay kills: As expiration approaches, premium evaporates daily. Last week before expiry? Options lose 50%+ value regardless of stock movement.
Leverage magnifies losses: Option costs ₹100, controls ₹10,000 value. 10% stock move = 50% option move. Works both ways devastating on losses.
Expiration kills: Out-of-the-money options expire worthless 100% loss.
Real example: Buy HDFC call, strike ₹2,500, premium ₹10 = ₹1,000 total. Stock crashes to ₹2,200. Premium worthless. Your ₹1,000 = ₹0.
When Options Make Sense
Insurance strategy: Own 100 HDFC shares, buy put option = insurance against crash.
Covered call: Sell call on stock you own, collect premium. If stock rises past strike, forced to sell.
Never: Buy options before earnings without stop-loss.
Bottom Line
Call = bullish bet. Put = bearish bet.
Max loss on call = premium paid. Max loss on put = strike price minus premium.
Time decay accelerates near expiry. Understand this or lose everything.
95% of retail options traders lose money. It’s not a coincidence that leverage kills discipline.
Start with index funds. Graduate to options only after 3+ years trading stocks profitably.
