We introduce a decomposition showing precisely how actively-managed portfolio returns can be separated into three measurable components that we call Opportunity, Foresight, and Active Management Risk. Opportunity reflects the degree to which the investment opportunity set contains exploitable...

"Traditionally, investments textbooks tend to fall into one of two camps. The first type has a greater focus on portfolio management and covers a significant amount of portfolio theory. The second type is more concerned with security analysis and generally contains fairly detailed coverage of...