Any chance of a normal Friday for those of us interested in, or invested in, the stock market went out the window when Amazon.com Inc. (NASDAQ: AMZN) announced it would be buying Whole Foods Market Inc. (NASDAQ: WFM) for $13.7 billion. The news sent a shiver through companies with even a toe dipped in the food retail industry, and shock waves through the ones most closely involved. As of around 12:40 p.m.