Warning: Before You Buy Chipotle Stock, Know This 1 Key Risk

With its shares up a jaw-dropping 335% in just the last five years, investors clearly have a strong appetite for Chipotle Mexican Grill (CMG 0.74%). This monumental gain significantly exceeds both the S&P 500's and the Nasdaq Composite's returns, as well as those of most of the "Magnificent Seven" constituents.Despite macroeconomic headwinds and uncertainty, this Tex-Mex restaurant chain has proven its resilience. And the business is currently firing on all cylinders.But don't rush to buy the stock just yet ...