Margin Collection by Clearing Corporation

Margin is a security deposit that participants must maintain to cover potential losses on open currency derivative positions. The clearing corporation (CC) acts as the central counter‑party and is mandated by SEBI to collect, hold, and manage this margin on behalf of all market participants.

The primary purpose of margin collection is to mitigate credit risk. By ensuring that each trader has sufficient funds, the CC protects the exchange from systemic failures that could arise if a participant defaults on settlement.

For the NISM exam, remember that margin collection is a continuous, daily activity, not a one‑time event. Questions often test your knowledge of when and how additional margin is demanded, and the consequences of failing to meet a margin call.

• Margin is posted before entering a trade (initial margin) and adjusted daily (variation margin).
• Failure to meet a margin call leads to position liquidation by the clearing corporation.

The clearing corporation distinguishes three margin components: Initial Margin (IM), Variation Margin (VM), and Additional (or Extra) Margin (AM). Each serves a specific risk‑mitigation purpose.

Initial Margin is calculated at the time of trade execution and is based on a predefined margin rate set by the exchange. It acts as a buffer against adverse price moves before the first daily mark‑to‑market.

Variation Margin is the amount that must be transferred each day to reflect the net profit or loss of the position. If the position gains, the trader receives VM; if it loses, the trader must pay VM to the CC.

Additional Margin is demanded when the cumulative variation margin causes the total margin balance to fall below the maintenance margin threshold. The CC issues a margin call, and the participant must top up the shortfall within a stipulated time (usually 15 minutes for intraday and 30 minutes for overnight positions).

SEBI allows exchanges to set margin rates based on the volatility of the underlying currency pair, contract size, and the participant’s credit profile. The rates are reviewed periodically and published in the exchange’s circulars.

For high‑liquidity pairs like USD/INR, the exchange may set a lower margin rate (e.g., 10%) compared to exotic pairs, where rates can be 15% or higher. The clearing corporation applies the same rate uniformly to all participants for a given contract.

Exam candidates should know that the margin rate is expressed as a decimal in calculations, and that the exchange can adjust it without prior notice, making it a dynamic risk‑management tool.

At the end of each trading day, the clearing corporation calculates the market‑to‑market (MTM) value of every open currency derivative position using the day's closing spot rate. This process converts unrealised gains or losses into cash that must be settled.

If the MTM results in a loss, the trader owes variation margin to the CC; if it results in a gain, the trader receives variation margin. The net amount is transferred through the participant’s margin account automatically.

For the exam, remember that MTM is performed on a *gross* basis before any additional margin is considered. The CC uses the same algorithm for all participants, ensuring fairness and transparency.

When the sum of the initial margin and daily variation margin falls below the maintenance margin threshold, the clearing corporation issues a margin call. The participant must deposit the shortfall (additional margin) within the stipulated time frame, typically 15‑30 minutes.

If the participant fails to meet the margin call, the clearing corporation has the right to liquidate the position at prevailing market rates to protect the integrity of the market.

Exam questions may present a scenario where the margin balance after MTM is given, and you will be asked to calculate the additional margin required. Always compare the post‑MTM balance with the maintenance margin level before answering.