If you trade in the Indian stock market—especially in segments like intraday or derivatives—you’ve likely come across the term margin. Margins are a crucial part of the trading ecosystem, acting as a safety buffer for brokers and exchanges against potential losses.
However, many traders find margin concepts confusing due to the different types involved. This blog simplifies the various types of margins collected by stockbrokers in India and explains how they impact your trading.
Margin in Trading
Margin is the amount of money a trader must deposit with a broker to take a position in the market. It ensures that traders can meet their obligations in case the market moves against them.
Margins are regulated by exchanges like the National Stock Exchange (NSE) and Bombay Stock Exchange (BSE), along with the Securities and Exchange Board of India (SEBI).
Why Do Brokers Collect Margins?
Margins serve multiple purposes:
* Protect brokers from client defaults
* Reduce systemic risk in the market
* Ensure discipline among traders
* Provide leverage opportunities
Types of Margins in India
1. SPAN Margin
*SPAN (Standard Portfolio Analysis of Risk) is a system used by financial exchanges to calculate the initial margin required for Futures and Options (F&O) trading. It evaluates an entire trader’s portfolio to estimate the maximum probable loss over a single trading day, adjusting dynamically based on market volatility
It is calculated using a risk-based model that considers:
* Price volatility
* Time to expiry
* Market conditions
Where It Applies
* Futures
* Options (especially for sellers)
SPAN margin ensures that your position is protected against worst-case scenarios.
2. Exposure Margin
An Exposure Margin is an additional safety buffer charged by stock exchanges over and above the standard SPAN margin in derivatives trading. It acts as an extra layer of protection to safeguard brokers and the exchange against sudden, extreme market movements or credit risks that the primary margin model might miss.
Acts as a cushion against unexpected market volatility.
* Fixed percentage of contract value
* Mandatory for derivatives trading
Example
If SPAN margin is ₹1,00,000, exposure margin might be ₹30,000 extra.
3. Initial Margin
Initial margin is the upfront collateral or cash an investor must deposit with a broker to open a leveraged position. It acts as a “good faith” security deposit, allowing the trader to control a much larger asset value than their actual account balance while protecting the broker against potential losses.
The total margin required to initiate a trade.
*Initial Margin = SPAN Margin + Exposure Margin*
You must have this amount available before placing a trade.
4. Maintenance Margin
Maintenance margin is the minimum equity an investor must keep in a margin account to hold borrowed positions. If the account value falls below this threshold due to losses, brokers issue a margin call requiring the investor to add more funds or close positions to prevent forced liquidation
What Happens If You Fall Below?
* Broker issues a margin call
* You must add funds or square off positions
5. Mark-to-Market (MTM) Margin
Mark-to-Market (MTM) margin is the daily settlement of unrealized profits and losses on open futures and derivative positions based on the exchange’s closing prices. At the end of every trading day, your account balance is adjusted to reflect the current market value. If the MTM process results in a loss that dips below your required maintenance margin, the broker will require you to deposit additional funds.
* Profits are credited daily
* Losses must be paid immediately
Prevents accumulation of large losses over time.
6. Peak Margin
Peak margin is the highest margin requirement recorded across multiple random snapshots of a trader’s open positions taken throughout a single trading day. Introduced by SEBI to prevent excessive leverage, it mandates that traders maintain adequate upfront funds at all times to cover their maximum intraday exposure
* Margin is checked multiple times during the day
* Traders must maintain margin at all times
Impact
* Reduced excessive leverage
* Increased transparency
7. Value at Risk (VaR) Margin
Value at Risk (VaR) margin is an upfront risk-based deposit required by exchanges to cover the maximum expected loss on a trading portfolio over a specific time horizon. It is calculated using statistical volatility models to ensure that an investor’s account has enough funds to survive normal, adverse market movements on 99% of trading days.
Where It Applies
* Primarily in equity delivery and intraday trading
Why It Matters
Ensures coverage for typical market fluctuations.
8. Extreme Loss Margin (ELM)
Extreme Loss Margin (ELM) is an additional risk buffer charged by financial exchanges to cover potential financial losses from rare, highly volatile market movements. It acts as a safety net over standard risk models like Value at Risk (VaR)
9. Delivery Margin
Delivery margin refers to the upfront cash or collateral that an investor must maintain in their trading account when buying or selling stocks for long-term delivery. While buying equity requires 100% upfront funds, selling holdings temporarily blocks a portion of the credit (usually 20%) to safeguard against settlement defaults. This ensures market stability and prevents excessive leverage across portfolios
* Usually lower risk compared to intraday
* Still requires upfront funds
10. Intraday Margin
Intraday margin is a temporary credit facility provided by brokers that lets you buy or sell securities using a small fraction of your own capital. It gives you greater purchasing power to amplify potential profits during the day ).
Benefit
* Higher leverage
* Lower capital requirement
Risk
* Higher exposure to volatility
Key Changes in Margin Rules in India
In recent years, the Securities and Exchange Board of India introduced stricter margin rules:
* Mandatory upfront margin collection
* Peak margin reporting
* Reduced leverage for traders
These changes aim to make markets safer and more stable.
* Always maintain extra margin to avoid forced liquidation
* Monitor margin requirements regularly
* Avoid over-leveraging
* Understand risks before trading derivatives
* Use broker platforms to track real-time margin
Margins are the backbone of risk management in the stock market. While they enable traders to take larger positions, they also come with responsibilities and risks.
Understanding the different types of margins—like SPAN, Exposure, MTM, and Peak Margin—can help you trade more safely and efficiently in the Indian markets.
In trading, it’s not just about profits—it’s about managing risk smartly. And margins are your first line of defence.