This document discusses perspectives from the buy side of investing. It begins by explaining the difference between buy side and sell side professionals, with buy side managers making investment decisions and sell side advising them. It then outlines the three main steps in managing a portfolio: stock selection, portfolio construction, and trading/monitoring. Next, it describes two main equity investing styles - quantitative strategies that use computers and statistics, and fundamental strategies relying on understanding companies. The rest of the document provides more details on quantitative and fundamental stock selection models, portfolio construction considerations, and trading/monitoring activities. It concludes by noting skills useful for a career in investing like the CFA and working with financial data systems.