37.

The model shall employ current market data to compute current exposures. When using historical data to estimate volatility and correlations, at least three years of historical data shall be used and shall be updated quarterly or more frequently if market conditions warrant. The data shall cover a full range of economic conditions, such as a full business cycle. A unit independent from the business unit shall validate the price supplied by the business unit. The data shall be acquired independently of the lines of business, fed into the model in a timely and complete fashion, and maintained in a database subject to formal and periodic audit. A credit institution shall also have a well‐developed data integrity process to clean the data of erroneous and/or anomalous observations. To the extent that the model relies on proxy market data, including, for new products, where three years of historical data may not be available, internal policies shall identify suitable proxies and the credit institution shall demonstrate empirically that the proxy provides a conservative representation of the underlying risk under adverse market conditions. If the model includes the effect of collateral on changes in the market value of the netting set, the credit institution shall have adequate historical data to model the volatility of the collateral.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-09 · Text as adopted (Official Journal); later amendments are not incorporated in this text.