All right, let's take a look at shares of Walmart. Right now, they are off by three and a quarter percent because the company is just announcing that Doug McMillan, the chairman and CEO, is going to be retiring. He's stepping down from the company uh where he has been in charge for more than 12 years.During that time, Doug McMillan has more than quadrupled Walmart's market cap. He's also set the company up for continued growth. He's been seen as somebody who is not only a stalwart leader but also a a vision ...