Security Market Line that Describes the Relation Between Expected Asset Returns and Beta Security Betas of U.S. Companies’ Common Stock Company Industry Security Beta Security Security Beta Amount Invested . [...]... Coefficient of Returns on Securities A and B Proportion of Portfolio Invested in Asset P Security Portfolio Return Proportion of Portfolio Invested in Asset Q Security Beta Covariance between Returns on Securities A and B Portfolio Return Portfolio Variance Covariance Between Returns on Assets P and Q Portfolio Standard Deviation Portfolio Variance Portfolio Standard Deviation 307 ... ■ ■ ■ ■ ■ ■ ■ ■ Costs of Capital Source Weight Cost of Capital - - - - - Marginal Costs of Debt and Common Stock Debt Amount of New Debt Marginal Cost of Debt per Year Equity Amount of New Equity Marginal Cost of Common Stock per Year ■ ■ ■ . Rate Correlation Coefficient of Returns on Securities A and B Portfolio Return Covariance between Returns on Securities A and B Portfolio Variance Portfolio Standard Deviation Proportion of Portfolio Invested. on Assets P and Q Portfolio Variance Portfolio Standard Deviation Security Security Beta 307