问答题 A common stock(typically just called a stock)represents a share of ownership in a corporation．It is a security that is a claim on the earnings and assets of the corporation．Issuing stock and selling it to the public is a way for corporations to raise funds to finance their activities．The stock market is the most widely followed financial market in aimost every country that has one；that’s why it is often called simply“the market”．A big swing in the prices of shares in the stock market is always a major story on the evening news．People often speculate On where the market is heading and get very excited when they can brag about their latest“big earning”but they become depressed when they suffer a big loss．The attention the market receives can probably be best explained by one simple fact：it is a place where people can get rich—or poor—quickly．