> ## Documentation Index
> Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt
> Use this file to discover all available pages before exploring further.

# CA-Lookback

> The CA-Lookback context value in FRTBCombinedCube, controlling the number of business days used in IMCC and SES average calculations, defaulting to 60 days per Basel MAR33.41

<Badge color="gray" size="lg">[Lookback](../tags/lookback)</Badge>

|                 |                                                                                                                                             |
| --------------- | ------------------------------------------------------------------------------------------------------------------------------------------- |
| **Description** | The number of days for IMCC and SES average calculations                                                                                    |
| **Reference**   | [\[MAR33.41\]](https://www.bis.org/basel_framework/chapter/MAR/33.htm?inforce=20230101\&published=20200327#paragraph_MAR_33_20230101_33_41) |

You can use this context value to override the default number of days for IMCC and SES average calculation.

The default lookback period is "60" (business days).