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What is Inverse Covariance Matrix in Finance about?

The document discusses the inverse covariance matrix and how it relates to linear regressions. Specifically: 1) The inverse covariance matrix can be represented as parameters from a system of linear regressions between returns. 2) For two returns, the inverse covariance matrix elements are ratios of covariances to variances that can be derived from a simple linear regression model. 3) This relationship generalizes to systems of N linear regressions between N returns, allowing the inverse covariance ma

Author

Vivian Moonen

Language

EN