Most databases and financial web sites provide only a few years of stock price history. Daily stock price history is available in relatively fewer sources.
As it relates to investments, Beta is a statistical measure of the relative volatility of a stock, fund, or other security in comparison with the market as a whole. The beta for the market is 1.00. Stocks with betas above 1.0 are more responsive to the market, but are also more risky investments. Stocks with a beta below 1.0 tend to move in the opposite direction of the market.
Beta is available in the following resources: