The most important characteristic in determining the expected return of a well-diversified portf

step 1 The expected return of a portfolio can be calculated using either the value and dividends stream

The most important characteristic in determining the...

Key Concepts

Capital Asset Pricing Model (CAPM) and Beta

The Capital Asset Pricing Model (CAPM) explains how expected returns on an asset are related to its systematic risk, as measured by beta. Beta indicates how much an asset's price moves relative to the market. In a diversified portfolio, it is the beta, reflecting systematic risk, that drives expected returns—not the asset’s total variance.

Expected Return and Risk Premium

Expected return is the mean value of returns anticipated on an investment and is determined by the risk premium required for taking on systematic risk. Investors are compensated for bearing systematic risk rather than the total variance, as the latter includes diversifiable elements that do not impact the expected return in a diversified portfolio.

Portfolio Diversification

Portfolio diversification is the process of investing across a variety of assets to reduce the impact of any single asset's volatility on the overall portfolio's risk. By combining uncorrelated or less correlated assets, the unsystematic risk can be effectively minimized, leaving the portfolio primarily exposed to systematic risk factors that influence returns across the market.

Unsystematic and Systematic Risk

Unsystematic risk, specific to individual assets, can be diversified away in a well-diversified portfolio, whereas systematic risk impacts all assets and cannot be eliminated through diversification. Expected returns are primarily compensations for bearing systematic risk, not unsystematic risk.

Variance

Variance is a statistical measure of the dispersion of returns for a given security or portfolio. For individual assets, variance includes both systematic and unsystematic components, but in a diversified portfolio, the unsystematic component is reduced, making variance less central in determining expected return.

Transcript

Please give Ace some feedback