How Kirkland Quietly Became Costco's Most Powerful Moat

When investors think of Costco Wholesale (COST 0.65%), they usually focus on its membership model. After all, annual membership fees generate billions of dollars in recurring income and help anchor the company's profitability.But another piece of Costco's strategy deserves just as much attention. Over the years, the company has quietly built one of the most powerful private-label brands in retail: Kirkland Signature.What started as a simple store brand has evolved into a strategic asset that strengthens Cos ...