Masters of Compounding: Walmart ($WMT) 1968-2012

In a couple of months, first Geoff Gannon then Whopper flashed the spotlight on Walmart.  One looked at it in the 1970s, the other - in the 80s.  Last year, I went back through the past 10 years.  Today, I am going to put all of this together and paint, with a broad brush, the last 45 years of the company in celebration of Walmart's 50th birthday.  I ma…