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CAPM
The capital asset pricing model (CAPM)
The basic concept behind the capital asset pricing model (CAPM) is that when investors accept additional risk, they should be rewarded with greater compensation. The formula for the model is as follows:
(Image source: CAPM, 2013, Investopedia)
It should be noted that the CAPM is just that -- a model -- and certain artificial conditions are assumed to make the formula work, namely an absence of taxes and transaction costs like broker's fees; symmetrical knowledge of information and "identical investment horizons" for all investors; and finally that "all investors have identical opinions about expected returns, volatilities and correlations of...
In the model, "the time value of money is represented by the risk-free (rf) rate in the formula and compensates the investors for placing money in any investment over a period of time. The other half of the formula represents risk and calculates the amount of compensation the investor needs for taking on additional risk. This is calculated by taking a risk measure (beta) that compares the returns of the asset to the market over a period of time and to the market premium (Rm-rf)" (CAPM, 2013, Investopedia).
In the CAPM, two fundamental types of risk exist: risk that is systemic to the market and risks which are specific. Systemic risk is…
References
Capital asset pricing model. (2013). Risk Encyclopedia. Retrieved:
http://riskencyclopedia.com/articles/capital_asset_pricing_model/
CAPM. (2013). Investopedia. Retrieved:
http://www.investopedia.com/terms/c/capm.asp
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