Introductory Context
"SEBI regulates India's F&O market through circulars setting lot sizes, margin requirements, position limits, expiry structures, and investor protection rules. Key 2024 changes — lot size revision, weekly expiry rationalisation, and enhanced KYC requirements — directly affect every retail options trader's strategy and capital needs. "
Key Current Regulations
Lot Size Revision — November 2024
SEBI revised lot sizes for all major F&O contracts in November 2024, increasing minimum contract value to ₹15–20 lakh. Nifty 50: 75 units. Bank Nifty: 30 units. FinNifty: 65 units. Midcap Nifty: 50 units. Rationale: ensuring participation is limited to adequately capitalised traders, following the 2023 study showing 89% of individual F&O traders lost money.
Always Verify Current Lot Sizes
SEBI revises lot sizes periodically. Verify the current lot size on nseindia.com under Equity Derivatives → Contract Specifications before any F&O trade. Never rely on memory or older educational resources.
Weekly Expiry Rationalisation — October 2024
SEBI's October 2024 circular limited each exchange to weekly expiry on only one benchmark index. For NSE: Nifty 50. Bank Nifty, FinNifty, and Midcap Nifty moved from weekly to monthly expiry. Rationale: proliferation of weekly expiry contracts on multiple indices was concentrating retail activity in very short-duration, high-gamma options that SEBI research showed were disproportionately loss-making for retail participants.
Peak Margin Rule — September 2021
Full required margin must be available in the trading account at all times during market hours — not just at end of day. Before this rule, some brokers offered intraday leverage on F&O. The peak margin rule eliminated this, significantly changing capital requirements for short options positions.
SEBI 2023 Retail F&O Loss Study
SEBI's 2023 study found 89% of individual F&O traders lost money over FY2021–FY2023, average net loss ₹1.1 lakh per trader. This provided empirical justification for all 2024 regulatory tightening.
Physical Settlement — 2019
Individual stock options that expire ITM require actual delivery of shares rather than cash settlement. This brought Indian stock options in line with international practice and created the capital requirement implications covered in Module 3 of this curriculum.
Position Limits — Preventing Concentration
• maximum open position a single client can hold. For index options: typically 3,500 lots or 15% of total market OI, whichever is higher: Client level.
• maximum total positions across all clients of a single broker: Member level.
• maximum total OI allowed on any single underlying — for individual stocks capped at 20% of total free-float shares outstanding: Market-wide.
Where to Find SEBI Circulars
All SEBI circulars are publicly available at sebi.gov.in under Legal Framework → Circulars. For F&O traders, relevant circulars are under Derivatives and Market Regulation. Reading the original circular, not a media summary, is always the most accurate way to understand regulatory changes.