Explain the concept of beta.

• The dividend a stock pays
• A measure of a company's profitability
• A measure of a stock's sensitivity to market moves: 1 moves with the market, above 1 is less volatile, below 1 more
• The company's growth rate
• A measure of a stock's sensitivity to market moves: 1 moves with the market, above 1 is more volatile, below 1 less