What Is a Credit Support Annex (CSA)?

What Is a Credit Support Annex (CSA)?

3 Min.

In privately-negotiated derivatives trading, a Credit Support Annex (CSA) is an essential contract agreement. It outlines the terms related to the collateral provided by both parties involved in the trade. The purpose of collateral is to mitigate the significant risk of potential losses inherent in derivatives trading.


CSA is a crucial document within the International Swaps and Derivatives Association (ISDA) framework. It establishes the terms governing the collateral provision in derivatives transactions. This document is part of the four components comprising the standard contract or master agreement developed by ISDA.

When engaging in privately-negotiated or over-the-counter (OTC) derivative securities trading, parties must utilize ISDA master agreements. Unlike trading on established exchanges, private agreements constitute the predominant approach in the derivatives market.

Principles of CSA Operation

Defining and recording the collateral offered by both parties involved, CSA plays a crucial role in derivatives transactions. This ensures that they can cover any potential losses that may arise. Derivatives trading is inherently risky, as it involves agreements to buy or sell a specific quantity of assets at a predetermined date. The upfront payment made is only a fraction of the underlying asset's value, while the contract's worth fluctuates with the asset's price.

OTC derivatives, in particular, carry higher risks compared to those traded on exchanges. OTC markets lack the same level of regulation and standardization found in exchange markets. However, OTC derivatives are frequently used for speculation and risk hedging purposes. Many major corporations engage in derivatives trades to protect their businesses from losses caused by currency price fluctuations or sudden shifts in raw material costs.

Given the substantial risks involved, derivatives traders typically provide collateral as credit support for their trades. This collateral serves as a form of security to mitigate potential losses on both sides of the transaction. By doing so, traders aim to safeguard their positions and manage the risks associated with derivatives trading.

Why Is Collateral Necessary?

Derivatives traders commonly provide collateral as a form of credit support due to the high risk involved. This collateral acts as a guarantee to cover potential losses. Cash or securities are typically used as collateral in derivatives trading. The collateral amount is defined in a CSA document, and its location of storage is specified. Daily monitoring of collateral helps ensure risk mitigation and stability in derivatives trading.

The Master Agreement

When trading derivatives, a master agreement is necessary, but the CSA is not mandatory. Since 1992, the master agreement has been used to establish and enforce the terms of derivatives trades. This agreement is published by ISDA, a global trade association for participants in futures, options, and derivatives markets.


The Credit Support Annex plays a crucial role in privately-negotiated derivatives trading. It outlines the collateral terms that both parties must provide to mitigate the significant risk of potential losses. The CSA is part of the International Swaps and Derivatives Association framework that is used to establish and enforce the terms of derivatives trades. Understanding the principles of CSA operation and the importance of collateral is essential for anyone involved in the derivatives market.


Credit Support Annex (CSA)
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