30-Day Stock Market Series
Day 22 of 30
Options 101: Calls, Puts & Why Retail Traders Get Burned
Options are the most misused instruments in Indian markets. SEBI data shows 89% of F&O traders lose money. Day 22 explains why — and the right way to think about derivatives.
What is an Option Contract?
An option gives you the right but not the obligation to buy (Call) or sell (Put) an underlying asset at a specific price (Strike Price) on or before a specific date (Expiry).
Call Option
Right to BUY at strike price. You buy Calls when you're bullish. Profit when stock rises above strike + premium paid.Put Option
Right to SELL at strike price. You buy Puts when you're bearish or for hedging. Profit when stock falls below strike − premium paid.Options Terminology
- Premium: The price you pay for the option
- Strike Price: The agreed price in the contract
- Expiry: Weekly (Thursday) or Monthly (last Thursday of month) in India
- ITM/ATM/OTM: In/At/Out of the money — whether current price is above, at, or below strike
- Lot Size: Options trade in lots (Nifty = 50 units per lot)
The Greeks: Why Options Are Complex
# The 4 main option Greeks
delta = 0.50 # Price sensitivity: ATM call moves ~₹0.5 per ₹1 stock move
gamma = 0.03 # Rate of change of delta
theta = -15 # TIME DECAY: option loses ₹15 per day as expiry nears
vega = 20 # Volatility sensitivity: option gains ₹20 per 1% VIX rise
# This is why retail buyers lose: THETA destroys option value daily
days_to_expiry = 7
theta_loss = abs(theta) * days_to_expiry
print(f"Theta decay over 7 days: ₹{theta_loss}")
The Retail TrapBuying cheap OTM weekly options for "lottery" returns. Theta erodes these options daily. You need a very large, fast move in the right direction just to break even. The house always wins on expiry day.
Smart Uses of Options
- Hedging: Buy Nifty Puts to protect your equity portfolio during uncertain times
- Covered Calls: Sell calls against your existing stock holdings for extra income
- Spreads: Defined-risk strategies for directional bets with limited premium outflow
Today's Golden Rule
If you're new to markets, stay away from options trading. Master equity delivery first (Days 1–21). Options are sophisticated risk management tools — not lottery tickets. Study before you trade.