> ## 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.

# NbDaysPLMeasures

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| **Description** |   |

The number of business days to look back when calculating the Mean, Variance, and Standard Deviation measures for PL Attribution Tests.  This may also be expressed as a period, to look back a number of calendar days, for example, "1M", "3M", "1Y" (para 183 (d) of BCBS 352)