11.1 Diversifiable and Nondiversifiable Risks In broad terms, why is some risk diversifiable? Why are some risks nondiversifiable? Does it follow that an investor can control the level of unsystematic risk in a portfolio, but not the level of systematic risk? 11.2 Information and Market Returns Suppose the government announces that, based on a just-completed survey, the growth rate in the economy is Determining Portfolio Weights What are the portfolio weights for a portfolio that has 185 shares of Stock A that sell for $64 per share and 115 shares of Stock B that sell for $49 per share