Beta is the result of a calculation that measures the relative volatility of a stock in correlation to a particular standard. For U.S. stocks that standard is usually, but not always, the S&P 500. Beta is a form of regression analysis and it can be useful for investors regardless of their risk tolerance. Beta is considered one of the few data points that can be beneficial for practitioners of fundamental analysis and technical analysis. This page lists stocks with negative beta calculations. A beta of -1 means the stock tends to move opposite the market — if the market rises 1%, the stock would be expected to fall about 1%, on average.