In the video below, Motley Fool Analyst Jim Mueller discusses some of the key metrics investors need to keep an eye on with Whole Foods Market (WFM) moving forward. 

Despite returning early investors more than 30 times their original investment, Whole Foods is positioned to grow even further. Jim is watching closely to see if the company can continue growing same-store sales while also increasing the rate of new stores being opened. 

Furthermore, Jim discusses Whole Foods' net margins -- more than double that of the competition -- and how maintaining these margins in an increasingly competitive organic grocery business is critical to the company's ability to continue to reward shareholders for years to come.