Think tech stocks are expensive? Try Walmart. America’s biggest retailer has become a true investor darling. Its shares have risen about 27% this year, bringing its market value above $900 billion.

Walmart is one of the largest retailers in the world and is performing well right now. The company is positioned to benefit in good economic times and bad ones. Walmart isn't going to be a good fit ...

Its sheer size gives the retailer unfair advantages. Low-cost consumer goods are also always marketable in any environment. Despite what seems to be an “old-school” business model, Walmart’s business ...