Look beyond the stock price at the business when shares are volatile. When the stock market is volatile and share prices tumble, opportunities arise to search for great businesses with stocks temporarily trading at bargain levels. When this happens, investors with a multiyear buy-and-hold strategy can shrewdly add such stocks to their portfolio while others sit on the sidelines. It's true that just because a stock is trading lower doesn't necessarily mean it has become a better buy. Sometimes, stocks trade ...