FIN 4504 Lecture Notes - Lecture 12: Risk Premium, Takers, Risk-Free Interest Rate

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Beta a measure of systematic risk. How volatile an investment is compared to the overall market. A (cid:271)eta of (cid:1005). (cid:1004) i(cid:374)di(cid:272)ates that the se(cid:272)u(cid:396)it(cid:455)"s p(cid:396)i(cid:272)e (cid:373)o(cid:448)es (cid:449)ith the (cid:373)a(cid:396)ket. If an asset is less volatile than the market, it will have a beta lower than 1. 0. If an asset is more volatile than the market, it will have a beta greater than 1. 0. Beta = covariance (stock price, market index)/ variance (market index) If beta is a measure of risk, then investors who hold stocks with higher return for taking on that risk. Capm is capital asset pricing model, one of the most fundamental concepts in investment theory. It is an equilibrium model that predicts the relationship between the risk & equilibrium expected returns on risky assets. To get the p(cid:396)edi(cid:272)tio(cid:374), (cid:449)e (cid:374)eed to k(cid:374)o(cid:449) the e(cid:454)pe(cid:272)ted (cid:396)etu(cid:396)(cid:374) o(cid:374) the (cid:373)a(cid:396)ket, the sto(cid:272)k"s (cid:271)eta coefficient, & the risk free rate. > no information asymmetry, no transaction costs, no tax.

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