Capital asset pricing model

Updated: Aug 20, 2021

Capital Asset Pricing Model (CAPM) A model of equilibrium in financial markets that generates very precise predictions about the structure of returns on risky assets. The CAPM assumes the infinite divisibility of assets, no transaction costs, and no taxes. It also assumes that all investors have a one-period investment horizon, hold the same expectations about asset returns, have *mean-variance preferences, and are able to borrow and lend at a risk-free rate of interest. Under these assumptions, the equilibrium of the financial market is described by the Capital Market Line (CML) and the Security Market Line (SML).

Capital asset pricing model

Security Market Line

The CAPM has the implication that investors should divide their funds between the risk-free assets and the market portfolio. No other risky portfolio should be held. See arbitrage pricing theory.

Reference: Oxford Press Dictonary of Economics, 5th edt.

Sources & references
Risk disclaimer

Invezz is a place where people can find reliable, unbiased information about finance, trading, and investing – but we do not offer financial advice and users should always carry out their own research. The assets covered on this website, including stocks, cryptocurrencies, and commodities can be highly volatile and new investors often lose money. Success in the financial markets is not guaranteed, and users should never invest more than they can afford to lose. You should consider your own personal circumstances and take the time to explore all your options before making any investment. Read our risk disclaimer >

James Knight
Editor of Education
James is a lead content editor for Invezz. He's an avid trader and golfer, who spends an inordinate amount of time watching Leicester City and the… read more.