Derivatives & F&O

Futures and options on NSE — lot sizes, margin, hedging vs speculation.

⚠️ High-Risk Warning

Derivatives trading involves substantial risk of loss and is not suitable for all investors. Leverage can amplify both gains and losses. Most retail F&O traders lose money. Only trade derivatives if you fully understand how they work, can afford the risk, and have surplus capital. This guide is educational only—not investment advice.

What are Derivatives?

Derivatives are financial contracts whose value is derived from an underlying asset (stock, index, commodity, currency). The two main types are futures and options.

Why Derivatives Exist

  • Hedging: Protect existing positions from price movements
  • Speculation: Bet on future price movements with leverage
  • Arbitrage: Exploit price differences between markets

Futures Contracts

A futures contract is an agreement to buy or sell an asset at a predetermined price on a future date. Both parties are obligated to fulfill the contract.

Key Features

  • Standardized: Fixed lot size, expiry date set by exchange
  • Marked-to-Market: Daily profit/loss settlement
  • Margin: Need only 10-20% of contract value upfront (rest is leverage)
  • Expiry: Last Thursday of every month

Example: Nifty Futures

Nifty currently at 20,000. You buy 1 lot Nifty Futures (lot size: 50) at 20,000.

  • Contract value: 20,000 × 50 = ₹10,00,000
  • Margin required: ~₹1,50,000 (15%)
  • If Nifty rises to 20,100: Gain = 100 points × 50 = ₹5,000
  • If Nifty falls to 19,900: Loss = 100 points × 50 = ₹5,000

Notice: ₹5,000 gain/loss on ₹1.5 lakh margin = 3.3% move. But the index moved only 0.5%. This is leverage.

Options Contracts

An option gives the buyer the right (not obligation) to buy (Call) or sell (Put) an asset at a specific price (Strike) before expiry. The seller (writer) has the obligation.

Types of Options

  • Call Option: Right to BUY at strike price. Profit when market rises.
  • Put Option: Right to SELL at strike price. Profit when market falls.

Option Buyer vs. Seller

  • Buyer (Long): Pays premium. Limited loss (premium), unlimited profit. No margin needed.
  • Seller (Short/Writer): Receives premium. Limited profit (premium), unlimited loss. Margin required.

Example: Buying a Call Option

Nifty at 20,000. You buy 20,500 Call expiring next week for premium ₹50 per unit. Lot size = 50.

  • Total cost: ₹50 × 50 = ₹2,500 (your max loss)
  • If Nifty closes at 20,700: Intrinsic value = 20,700 - 20,500 = 200. Profit = (200 - 50) × 50 = ₹7,500
  • If Nifty closes at 20,400: Option expires worthless. Loss = ₹2,500 (premium paid)

Intrinsic Value vs. Time Value

Intrinsic Value: Actual profit if exercised now. Call: Max(0, Spot - Strike). Put: Max(0, Strike - Spot).

Time Value: Premium above intrinsic value. Decays as expiry approaches (theta decay). Weekly options lose value fast.

In-the-Money (ITM), At-the-Money (ATM), Out-of-the-Money (OTM)

  • ITM: Has intrinsic value. Call: Strike Spot.
  • ATM: Strike ≈ Spot. Highest time value.
  • OTM: No intrinsic value, only time value. Cheaper premiums but lower probability of profit.

Margin & Leverage

Futures and option selling require margin (collateral). Margin = risk buffer for the exchange. Can be cash, shares, or securities.

SPAN Margin: Initial margin based on worst-case loss scenario.

Exposure Margin: Additional buffer (usually combined with SPAN).

If your account falls below margin requirement, broker issues margin call. If not met, position is squared off automatically, often at a loss.

Common Strategies

1. Long Call (Bullish)

Buy call option expecting market to rise. Max loss = premium. Profit if market rallies above strike + premium.

2. Long Put (Bearish)

Buy put option expecting market to fall. Max loss = premium. Profit if market drops below strike - premium.

3. Covered Call (Income Generation)

Own the stock, sell call option against it. Earn premium income. If stock rises sharply, you miss out (stock called away at strike). Conservative strategy for stock holders. See options payoff calculator.

4. Protective Put (Hedging)

Own stock, buy put option as insurance. If stock falls, put gains offset losses. Cost: premium paid. Used by long-term investors to protect against short-term crashes.

5. Straddle (Volatility Play)

Buy both call and put at same strike. Profit if market moves sharply in either direction. Loss if market stays flat (lose both premiums). Used before major events (budget, election results).

6. Iron Condor (Range-Bound)

Complex strategy: sell OTM call + put, buy further OTM call + put. Profit if market stays within range. Limited profit and loss. For advanced traders only.

Risks in F&O Trading

1. Leverage Risk

Small price moves cause large % gains/losses. A 2% move against you can wipe out 20% of margin.

2. Time Decay (Theta)

Options lose value every day as expiry approaches, even if underlying doesn't move. Hurts option buyers.

3. Liquidity Risk

Not all strikes have good liquidity. Wide bid-ask spreads eat into profits. Stick to Nifty, Bank Nifty, and top liquid stocks.

4. Assignment Risk

If you sell options (write), you can be assigned (forced to buy/sell underlying). Can lead to unexpected large positions.

5. Gap Risk

Markets can gap up/down overnight (global events, earnings). Stop-loss orders don't protect against gaps.

6. Margin Calls & Square-Off

If you don't maintain margin, broker squares off positions at market price, often locking in losses.

Why Most Retail Traders Lose

  • Lack of knowledge and strategy
  • Overleveraging (taking positions too large for account size)
  • Emotional trading (revenge trading after losses)
  • Ignoring risk management (no stop-loss)
  • Trading weekly options (high decay, low probability)
  • Following tips without understanding

If You Still Want to Trade F&O

Essential Rules

  1. Paper trade first: Simulate for 3-6 months without real money
  2. Risk only 1-2% per trade: If account is ₹5 lakh, risk max ₹10,000 per trade
  3. Use stop-losses always: Exit if trade goes against you by X%
  4. Avoid naked selling: Selling options without hedge = unlimited loss potential
  5. Start with buying, not selling: Limited loss as a buyer
  6. Learn Greeks: Delta, Gamma, Theta, Vega—understand how options behave
  7. Journal every trade: Review what worked and what didn't

Prefer Hedging Over Speculation

If you have a long-term stock portfolio, use options to hedge (buy protective puts during uncertain times). This is a legitimate use case. Pure speculation is gambling unless you have an edge.

Regulation & Safety

F&O trading in India is regulated by SEBI. Exchanges: NSE, BSE. Trade only through SEBI-registered brokers. Verify broker registration on SEBI website.

Better Alternatives for Most Investors

If your goal is wealth building, long-term equity investing or SIPs in mutual funds have far better success rates than F&O trading. F&O is a zero-sum game (one person's gain is another's loss, minus costs). Equity investing is positive-sum (companies create value over time).

Educational Calculators

Frequently asked questions

Who can trade F&O in India?

SEBI and brokers require proof of trading experience and financial eligibility. Rules tightened in 2024–25 to protect retail investors from leveraged losses.

What is lot size in Nifty futures?

Lot sizes are set by SEBI/exchanges and change periodically. Always check current NSE circulars — trading wrong lot size invalidates the order.

Is F&O suitable for hedging portfolio risk?

Institutions and experienced investors use index puts to hedge. Retail hedging is valid but requires understanding of cost, expiry, and basis risk.

Disclaimer: This guide is for educational purposes only. Not SEBI-registered investment advice. Consult a qualified advisor before making financial decisions.