Market Portfolio

Explained:

market portfolio


 
 

Ads by Contingency Analysis

The market portfolio is a theoretical notion used in portfolio theory. Consider a universe of risky investments available to an investor. The market portfolio is a portfolio consisting of every issue weighted proportionality to the total market value of that issue outstanding in the market.

For example, if we considered all the stocks that comprise the S&P 500 stock index as our universe, then a (market capitalization weighted) S&P 500 index fund would represent a market portfolio.

A practical shortcoming of the notion of a market portfolio is the fact that it depends upon the universe of risky assets considered. In many applications, this is limited to domestic equities, but it could be extended to include international equities, debt, real estate, etc.

Related Internal Links

beta A metric of the systematic risk of a portfolio.

capital asset pricing model—a model for asset pricing and portfolio construction.

capital market line—a set of portfolios obtainable by leveraging or deleveraging positions in a "super-efficient" portfolio.

efficient frontier—a set of portfolios that each maximize expected return for a given level of risk.

efficient market hypothesis A financial theory that markets are efficient in the sense that prices reflect all available information.

portfolio theory—a body of theory for how risk averse investors construct portfolios.

Sponsored Links

 

Related Books

The following books offer different perspectives on the role of the market portfolio in portfolio theory. Bernstein (1993) is a must-read history of finance during the 20th century. Body, Kane and Marcus (2004) is the standard university text on finance.

Capital Ideas

Peter L. Bernstein

quality

 

technical  

1993

 

Investments

Zvi Bodie, Alex Kane, Alan J. Marcus

quality

 

technical  

2004

 

Sponsored Links

Ads by Contingency Analysis

 

Disclaimer

website: http://www.contingencyanalysis.com
glossary direct link: http://www.riskglossary.com
copyright © Contingency Analysis, 1996 - current