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  2. How to use beta to evaluate a stock’s risk - AOL

    www.aol.com/finance/beta-evaluate-stock-risk...

    To calculate beta, investors divide the covariance of an individual stock (say, Apple) with the overall market, often represented by the Standard & Poor’s 500 Index, by the variance of the ...

  3. Beta (finance) - Wikipedia

    en.wikipedia.org/wiki/Beta_(finance)

    The true market-beta is essentially the average outcome if infinitely many draws could be observed. On average, the best forecast of the realized market-beta is also the best forecast of the true market-beta. Estimators of market-beta have to wrestle with two important problems. First, the underlying market betas are known to move over time.

  4. Alpha vs. beta in investing: What’s the difference? - AOL

    www.aol.com/finance/alpha-vs-beta-investing...

    If a stock has a beta of 1.2, it might be considered 20 percent riskier than the benchmark and therefore should compensate investors with a higher expected return. If the index returned 10 percent ...

  5. What Is Beta? Everything You Need to Know About ... - AOL

    www.aol.com/news/beta-everything-know-measuring...

    Beta measures how volatile a stock is in relation to the broader stock market over time. A stock with a high beta indicates it's more volatile than the overall market and can react with dramatic ...

  6. Single-index model - Wikipedia

    en.wikipedia.org/wiki/Single-index_model

    The term () represents the movement of the market modified by the stock's beta, while represents the unsystematic risk of the security due to firm-specific factors. Macroeconomic events, such as changes in interest rates or the cost of labor, causes the systematic risk that affects the returns of all stocks, and the firm-specific events are the ...

  7. Capital asset pricing model - Wikipedia

    en.wikipedia.org/wiki/Capital_asset_pricing_model

    An estimation of the CAPM and the security market line (purple) for the Dow Jones Industrial Average over 3 years for monthly data.. In finance, the capital asset pricing model (CAPM) is a model used to determine a theoretically appropriate required rate of return of an asset, to make decisions about adding assets to a well-diversified portfolio.

  8. What Beta Means: Understanding a Stock’s Risk - AOL

    www.aol.com/finance/beta-means-understanding...

    For example, if the market is making a big move 20% higher, a stock with a beta of 1.5 will tend to trade up 30%. In this way, an investor can maximize gains in a bullish market by picking up ...

  9. Jensen's alpha - Wikipedia

    en.wikipedia.org/wiki/Jensen's_alpha

    It is a version of the standard alpha based on a theoretical performance instead of a market index. The security could be any asset, such as stocks, bonds, or derivatives. The theoretical return is predicted by a market model, most commonly the capital asset pricing model (CAPM). The market model uses statistical methods to predict the ...