VIX 是基于标普 500 期权价格计算的 30 天预期波动率指数，常被称为“恐慌指数”。
Price-to-Earnings Ratio: a number that shows how much investors are willing to pay per dollar of a company's earnings. It helps you compare whether a stock is expensive or cheap relative to its profits.
学习如何使用股票筛选器找到包括 CBOE Volatility Index