Lot size revision F&O 2024
The F&O lot size revision in 2024 was a SEBI-led policy that increased the minimum contract size for Indian derivatives, with the explicit aim of making F&O contracts less accessible to small-ticket retail participants. The change was part of a broader package addressing retail F&O losses.
What changed
| Contract | Pre-revision lot size | Post-revision lot size |
|---|---|---|
| NIFTY 50 options | 50 | 75 (illustrative; check current NSE) |
| BANKNIFTY options | 15 | 25-30 |
| FINNIFTY options | 40 | 65 |
| MIDCPNIFTY options | 50 | 75 |
| Stock options (varies) | Per scrip | Generally increased |
(Exact lot sizes are set by NSE per scrip and revised periodically; check the NSE derivatives segment for current values.)
The minimum notional value of an option contract is approximately:
| Contract | Approximate notional (post-revision) |
|---|---|
| NIFTY 50 at 22,000 | Rs 16.5 lakh (75 x 22,000) |
| BANKNIFTY at 50,000 | Rs 15 lakh (30 x 50,000) |
| FINNIFTY at 23,000 | Rs 15 lakh (65 x 23,000) |
So a single Nifty option contract corresponds to about Rs 16.5 lakh of notional, vs Rs 11 lakh in the pre-revision regime.
Why SEBI revised lot sizes
The 90% retail loss study showed that small-ticket retail F&O trading was concentrated in retail accounts. SEBI’s logic:
- Smaller contract sizes attract less-prepared traders.
- Larger sizes force more consideration before each trade.
- The professional / institutional segment is unaffected (they trade in volume regardless).
- Retail concentration in weekly options was a particular concern.
By doubling or tripling lot sizes, the minimum bet size doubles or triples, naturally reducing low-conviction trades.
Impact on retail F&O strategy
Strategy capital requirements increase
Pre-revision: A trader could enter a Nifty option position with Rs 4-5 lakh margin (premium + initial margin).
Post-revision: The same position needs Rs 6-8 lakh, with the larger lot size requiring more capital lock-in.
For SPAN margin specifically, the requirement scales with notional contract value; a 50% larger lot means ~50% more SPAN.
Lower retail trade frequency
Pre-revision: A retail trader could place 5-10 small bets per day.
Post-revision: With each bet requiring more capital, the trader can place fewer concurrent positions.
Some strategies become uneconomical
Strategies that depended on rapid small-ticket trades (e.g., scalping option premium decay) become harder. The cost-per-trade matters less when each trade is fewer in number.
Spread strategies cost more
Multi-leg spreads (bull call, iron condor, etc.) require more capital per leg. The total capital lock-in for a 4-leg condor with 75-lot Nifty options is significantly higher than with 50-lot.
Industry adjustment
Zerodha and other brokers updated:
- Margin calculator to use new lot sizes.
- F&O contract specifications display.
- Order ticket pre-fill quantity (defaulting to 1 lot, but with the new lot quantity).
- Margin requirement displays.
Brokers communicated changes via email and in-app notifications ahead of the rollout.
Effect on liquidity
Initial concerns: higher lot sizes might reduce liquidity. Observed effect:
- Nifty 50 weekly options (post-Nov 2024 contraction): liquidity concentrated more in the dominant weekly; absolute liquidity in number of contracts dropped but notional liquidity (lots x lot size) is roughly stable.
- BankNifty weekly options: Similar pattern.
- Stock options: Liquidity in mid-cap stock options reduced more noticeably.
For most retail traders, liquidity remains adequate for trades in the popular contracts (Nifty, BankNifty).
Comparison with other markets
| Market | Minimum lot size (notional, approximate) |
|---|---|
| India (post-revision) | Rs 15-20 lakh per Nifty option |
| US (CBOE) | ~$10,000 per SPX option |
| Europe (Eurex) | Various; smaller minimum |
| Singapore (SGX) | Lower minimums |
India’s lot size post-revision is among the higher minimums globally. The intent is consistent: discourage small-ticket speculation.
What it means for traders
If you trade Nifty / BankNifty options
- Recompute your position sizing under the new lot sizes.
- Verify your strategy capital requirements meet the new minimums.
- Plan for slightly larger MTM swings per position.
If you trade stock options
- Many stock options had lot-size revisions; verify per contract.
- Liquidity in less-popular contracts may be thinner.
If you trade futures
- Less affected; futures lot sizes also changed but the impact on capital required is smaller percentage-wise.
See also
- SEBI 90% retail F&O traders lose money study
- SEBI F&O entry barrier rules 2024
- Weekly expiry contraction November 2024
- STT hike on F&O October 2024
- SEBI true-to-label charges October 2024
- SEBI broker risk disclosure norms
- SEBI peak margin rules explained
- Upfront margin requirements post-2020
- 50:50 cash collateral rule explained
- Direct payout to demat SEBI rule
- Margin trading SEBI new rules 2026
- SPAN and exposure margin on Kite
- Margin available / used / cash on Kite funds
- Margin required on order window
- Option premium credit on Kite funds
- Delivery margin field on Kite
- Kite Positions tab explained
- Derivative lot size on NSE
- NSE derivatives expiry calendar
- How to add F&O contracts to the marketwatch
- How to add Nifty / BankNifty options to the marketwatch
- How to add MCX F&O to the marketwatch
- Futures and options
- Nifty 50
- BankNifty
- FinNifty
- MidcapNifty
- Sensex
- SEBI
- Zerodha
External references
References
- SEBI, F&O lot size and minimum contract size framework, circulars dated 2024.
- NSE India, Contract specifications for Nifty / BankNifty / FinNifty / MidcapNifty options, nseindia.com.
- Zerodha margin policies, Updated lot sizes post-revision, zerodha.com.