This document discusses portfolio theory and investment funds. It covers key concepts such as Markowitz portfolio theory, risk and return, diversification, the efficient frontier, capital asset pricing model (CAPM), and types of investment funds. The main points are: 1) Portfolio theory holds that risk-averse investors can construct portfolios to optimize return for a given level of risk through diversification and choosing assets with low correlations. 2) The efficient frontier shows the set of optimal portfolios that offer the highest expected return for their level of risk. 3) CAPM is a model that describes the relationship between risk and expected return and is used to price assets based on their sensitivity to non-divers