NEW YORK (TheStreet) -- Shares of Chipotle Mexican Grill (CMG) are up by 0.16% to $495.87 at the start of trading on Monday despite the company saying it may never know what caused an E. coli outbreak last month.
The Mexican food chain no longer has any of the contaminated ingredients that could be the cause of the outbreak, according to a company spokesman cited by Reuters.
"It is doubtful that testing will ever be able to determine for sure what the cause of this was," the company said.
Other company and health officials investigating the outbreak have also identified the same difficulty in finding the cause of the larger E. coli outbreak at Chipotle in October, which affected at least 50 Chipotle customers in nine states.
Finding an exact cause for the latest E. coli cases "really can be a challenge with the limited information that may be available from the few cases that occurred," Laurence Burnsed, an epidemiologist for the Oklahoma State Department of Health, told Reuters.
Separately, recently, TheStreet Ratings objectively rated this stock according to its "risk-adjusted" total return prospect over a 12-month investment horizon. Not based on the news in any given day, the rating may differ from Jim Cramer's view or that of this articles's author. TheStreet Ratings has this to say about the recommendation:
We rate CHIPOTLE MEXICAN GRILL INC as a Buy with a ratings score of B. This is driven by several positive factors, which we believe should have a greater impact than any weaknesses, and should give investors a better performance opportunity than most stocks we cover. The company's strengths can be seen in multiple areas, such as its revenue growth, growth in earnings per share, increase in net income and notable return on equity. We feel its strengths outweigh the fact that the company has had lackluster performance in the stock itself.