Futures
A futures contract is an agreement to buy or sell an underlying (like NIFTY or Reliance) at a set price on a set future date. Futures trade in lot sizes and require margin — a fraction of the contract value — deposited with your broker. Movement in the underlying magnifies into your margin.
Options
Options are rights, not obligations, to buy (call) or sell (put) the underlying at a set strike price, expiring on a set date. Buyers pay a premium; sellers receive it. Options are nonlinear — the payoff graph bends, making them powerful but also easier to get wrong.
Lot sizes and margins
SEBI has repeatedly adjusted lot sizes (most recently in 2024–25) to raise the minimum exposure per contract. NIFTY lot size is currently 75, Bank Nifty 30. These change over time. The practical effect is that F&O is not a ₹10,000 activity — it is a ₹1 lakh+ activity.
Risks
SEBI's 2025 study found 91% of retail F&O traders lose money. F&O is leveraged — a 2% move in the underlying can be a 20%+ move on your margin. Options can expire worthless. Stop losses can slip. The SEBI warning is not theoretical; it is the lived experience of 9 out of 10 participants.
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