Stock Market Investing – Finding Stock Market Industry Beta. Stock Market Industry Beta is the measure of how a stock’s trading price moves compared to the market as a whole. Knowing this figure one can understand how volatile a stock is. A beta of 1 means a stock’s price fluctuates exactly as much as the market. A beta less than 1 means a stock is less volatile than the market and a beta greater than 1 means that stock is more volatile than the market.