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  2. Random walk hypothesis - Wikipedia

    en.wikipedia.org/wiki/Random_walk_hypothesis

    Random walk hypothesis test by increasing or decreasing the value of a fictitious stock based on the odd/even value of the decimals of pi. The chart resembles a stock chart. Whether financial data can be considered a random walk is a venerable and challenging question.

  3. Black–Scholes model - Wikipedia

    en.wikipedia.org/wiki/Black–Scholes_model

    Random walk: The instantaneous log return of the stock price is an infinitesimal random walk with drift; more precisely, the stock price follows a geometric Brownian motion, and it is assumed that the drift and volatility of the motion are constant. If drift and volatility are time-varying, a suitably modified Black–Scholes formula can be ...

  4. The Little Book of Common Sense Investing - Wikipedia

    en.wikipedia.org/wiki/The_Little_Book_of_Common...

    This is the third book in Wiley's "LITTLE BOOK. BIG PROFITS." series. The series includes The Little Book That Beats the Market by Joel Greenblatt (Wiley, 2005), ISBN 978-0-471-73306-5 and The Little Book of Value Investing by Christopher H. Browne (Wiley, 2006), ISBN 978-0-470-05589-2

  5. Stock market prediction - Wikipedia

    en.wikipedia.org/wiki/Stock_market_prediction

    The efficient market hypothesis posits that stock prices are a function of information and rational expectations, and that newly revealed information about a company's prospects is almost immediately reflected in the current stock price. This would imply that all publicly known information about a company, which obviously includes its price ...

  6. Carhart four-factor model - Wikipedia

    en.wikipedia.org/wiki/Carhart_four-factor_model

    In portfolio management, the Carhart four-factor model is an extra factor addition in the Fama–French three-factor model, proposed by Mark Carhart.The Fama-French model, developed in the 1990, argued most stock market returns are explained by three factors: risk, price (value stocks tending to outperform) and company size (smaller company stocks tending to outperform).

  7. Beta (finance) - Wikipedia

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

    Beta is the hedge ratio of an investment with respect to the stock market. For example, to hedge out the market-risk of a stock with a market beta of 2.0, an investor would short $2,000 in the stock market for every $1,000 invested in the stock. Thus insured, movements of the overall stock market no longer influence the combined position on ...

  8. 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 ...

  9. Stock valuation - Wikipedia

    en.wikipedia.org/wiki/Stock_valuation

    Stock valuation is the method of calculating theoretical values of companies and their stocks.The main use of these methods is to predict future market prices, or more generally, potential market prices, and thus to profit from price movement – stocks that are judged undervalued (with respect to their theoretical value) are bought, while stocks that are judged overvalued are sold, in the ...