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 (NASDAQ: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. 

Austin Smith owns shares of SUPERVALU. Jim Mueller has no positions in the stocks mentioned above. The Motley Fool owns shares of SUPERVALU and Whole Foods Market. Motley Fool newsletter services recommend SUPERVALU, The Fresh Market, and Whole Foods Market. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.