Another use for active share-understanding portfolio exposures

We show how active share can be decomposed into segment and stock-specific exposures to create an active share risk profile. The method is demonstrated for global equity portfolios by attributing active share into contributions from country, sector, stock-specific, and non-equity positions within portfolios. Active share risk profiles can be used to identify the underlying sources of benchmark-relative risk within a portfolio both for a point in time and over time, and to compare the exposures in a portfolio relative to competitors. The method is straightforward to implement and may form a useful part of the toolkit for understanding benchmark-relative risk exposures within actively managed portfolios.