For more details about functions used in this recipe, refer to the following links:
- Covariance: https://en.wikipedia.org/wiki/Covariance
- Covariance: http://mathworld.wolfram.com/Covariance.html
- Covariance: https://www.investopedia.com/terms/c/covariance.asp
- SUMMARIZE: https://docs.microsoft.com/en-us/dax/summarize-function-dax
- COUNTROWS: https://docs.microsoft.com/en-us/dax/countrows-function-dax
- AVERAGEX: https://docs.microsoft.com/en-us/dax/averagex-function-dax
- SUMX: https://docs.microsoft.com/en-us/dax/sumx-function-dax
- DIVIDE: https://docs.microsoft.com/en-us/dax/divide-function-dax
- MAX: https://docs.microsoft.com/en-us/dax/max-function-dax