In our Dec. 6 edition of MarketFoolery, Rich Greifner sheds some light on a common metric that investors use when evaluating retailers: same-store-sales. Rich likes the metric but thinks it can be misleading. 

Instead, he suggests looking at the breakdown of newer locations compared with older ones. That's important, because some high-growth retailers such as Chipotle or Ulta Salon may look expensive when evaluating their same-store-sales in aggregate, but when you break it out differently, you can more easily see how they'll continue to put up big growth numbers. 

Chipotle's stock has been on an absolute tear since the company went public in 2006. Unfortunately, 2012 hasn't been kind to Chipotle's stock, as investors question whether its growth has come to an end. Fool analyst Jason Moser's new premium research report analyzes the burrito maker's situation and answers the question investors are asking: Can Chipotle still grow? If you own or are considering owning shares in Chipotle, you'll want to click here now and get started!