Why are both SPAN and exposure margins required in F&O trading?

SPAN margin covers the estimated risk based on market volatility, while exposure margin provides additional protection against sudden and unexpected price movements. Together, they help maintain sufficient funds for open derivative positions.

Are SPAN and exposure margins regulated by SEBI?

Yes, margin rules for futures and options trading are regulated by SEBI and implemented through recognised stock exchanges. These regulations are designed to strengthen risk management and reduce the chances of market defaults.

Is 50% cash margin required for F&O?

Yes. Effective 1 April 2026, SEBI requires that at least 50% of the total margin collateral deposited for F&O trading must be in cash or cash equivalents (such as bank guarantees, fixed deposits, treasury bills, or government securities). Shares and other approved securities can make up the remaining 50%. This rule applies directly to the collateral clients deposit with their brokers.

What is a SPAN and exposure margin example?

SPAN margin is the mandatory initial capital required by the exchange to cover portfolio risk, while exposure margin is an additional buffer against wild intraday swings. For instance, to trade a specific stock futures contract, you might need a ₹90,000 SPAN margin and a ₹15,000 exposure margin, requiring a total upfront payment of ₹1,05,000.

What are the 4 types of margins?

The four primary types of margins used in trading are Initial Margin (the upfront funds needed to open a position) and Maintenance Margin (the minimum balance required to keep it active). In derivatives, these are specifically categorized as SPAN Margin (the exchange-calculated risk requirement) and Exposure Margin (the buffer charged against sudden market volatility).

What are margins and how can margin shortfall occur?

Margins are the cash or security deposits required by brokers to act as collateral against potential losses from leveraged trades. A margin shortfall happens when your account balance falls below the exchange's minimum mandatory threshold. This is typically triggered by adverse market movements, sudden regulatory hikes in margin percentages, or a decline in the value of your pledged shares.

What is a margin penalty, and why is it charged?

A margin penalty is a regulatory fine imposed by the stock exchange when an investor fails to maintain the necessary collateral for their open positions. It is strictly charged to penalize over-leveraging, enforce systemic risk discipline, and protect the broader financial market from clearing defaults.

What is Span and Exposure Margin?

Span and Exposure Margin

6 min read•Updated on 18th Jun, 2026•by Angel One

SPAN and exposure margin are margin requirements used in futures and options trading to manage risk and protect against potential losses. SPAN margin estimates portfolio risk, while exposure margin acts as an additional risk buffer. Together, these margins help exchanges reduce default risk and ensure positions are adequately funded, especially during periods of high market volatility.

Key Takeaways

SPAN margin is calculated using portfolio-based risk assessment models.

Exposure margin is charged additionally to protect against sudden and unexpected market fluctuations.

The total upfront margin for most F&O positions is the sum of SPAN margin and exposure margin.

Margin requirements may change depending on market conditions, contract value, and overall portfolio risk.

What is SPAN Margin?

SPAN (Standard Portfolio Analysis of Risk) is a portfolio-based risk margin system used by exchanges to determine the margin required for F&O positions. It is the minimum amount required to open a futures or options position. It is calculated through a risk-based system that measures how much loss a portfolio may face under different market conditions. The calculation takes multiple factors into account, including price fluctuations, volatility, strike price, expiry period, and the type of derivative contract involved.

The purpose of SPAN margin is to ensure that traders maintain sufficient funds to cover potential losses arising from adverse market movements. Since the calculation is directly linked to market risk, the margin requirement changes regularly depending on volatility and open positions. Contracts that carry higher risk or experience sharper price swings generally require a higher SPAN margin compared to relatively stable contracts.

Also Check Out : F&O Margin Calculator

What is Exposure Margin?

Exposure margin is an additional margin charged over and above the SPAN margin in futures and options trading. It acts as a buffer for risks that the SPAN model may not fully capture, such as sharp intraday moves or tail-risk scenarios. This margin helps reduce the overall risk exposure for exchanges and market participants during periods of sharp volatility or unexpected price fluctuations.

Unlike SPAN margin, which changes according to market risk and portfolio positions, exposure margin is calculated using exchange-defined risk parameters and may vary across index and stock derivatives depending on contract value and volatility. The amount varies depending on the type of derivative contract and the applicable exchange requirements. Both SPAN and exposure margins together form the total margin that traders must maintain to keep their F&O positions active.

Also Read About : What are Futures?

SPAN Margin vs Exposure Margin: Key Differences

SPAN margin and exposure margin are two key components of margin requirements in F&O trading. While SPAN margin covers estimated market risk, exposure margin acts as an additional buffer against sudden price fluctuations.

Basis of comparison	SPAN margin	Exposure margin
Meaning	Minimum risk-based margin required for an F&O trade	Additional margin collected over the SPAN margin
Main purpose	Covers potential losses based on market scenarios	Protects against sudden and unpredictable market movements
Calculation method	Calculated using risk analysis models and volatility data	Calculated as a percentage of contract value — 2% for index derivatives and 3.5% (or volatility-based, whichever is higher) for stock derivatives, as specified by the exchange
Impact of volatility	Changes frequently with market volatility	Generally stable and does not change with intraday market moves; may be revised by the exchange periodically based on policy changes
Risk coverage	Covers estimated trading risk	Covers extra market exposure risk
Margin movement	Revised regularly according to market conditions	Changes mainly when contract value changes
Role in trading	Acts as the primary margin requirement	Functions as an additional safety buffer
Applicability	Applicable to futures and options positions	Applicable along with SPAN margin in F&O trading

Also Read About: What is Margin Money?

How To Calculate SPAN and Exposure Margins

SPAN and exposure margins are calculated separately and then added together to determine the total initial margin required for an F&O position. SPAN margin estimates potential losses under different market scenarios, while exposure margin acts as an additional buffer against unexpected price movements.

The total margin is calculated as:

Initial Margin = SPAN Margin + Exposure Margin

SPAN margin calculation

SPAN (Standard Portfolio Analysis of Risk) uses a risk-based approach to estimate the highest possible one-day loss for a portfolio. The system analyses multiple price and volatility scenarios and identifies the largest estimated loss as the SPAN margin requirement.

Exposure margin calculation

Exposure margin is charged in addition to SPAN margin and is generally calculated as a percentage of the contract value. The applicable percentage may vary depending on the derivative contract and exchange risk parameters.

Example of margin calculation

Assume a futures contract has:

Contract value: ₹10,00,000

SPAN margin: ₹55,000

Exposure margin: ₹20,000

Total initial margin: => ₹55,000 + ₹20,000 = ₹75,000

The required margin can change based on market conditions and exchange risk parameters.

Also Read About : What is Derivative Trading?

Conclusion

SPAN and exposure margin are essential components of risk management in futures and options trading. While SPAN margin estimates the possible loss based on market conditions and portfolio risk, exposure margin provides an additional layer of protection against sudden price movements.

Together, these margins help maintain market stability and ensure that traders hold sufficient funds to support their open positions. A clear understanding of both margin types can also help traders manage capital more efficiently and reduce the risk of margin shortfalls.

Turn insights into action - Open Free Demat Account with Angel One and start investing instantly.