From the carnitas crisis of early 2015 to the more recent E. Coli outbreak.<br />And now, tough love from Wall Street.<br />Chipotle Mexican Grill Inc's (CMG.<br />N) shareholders have never had it so bad.<br />At least six brokerages slashed their price targets on the burrito chain operator's stock on Thursday, a day after the company said it was served with a grand jury subpoena related to a probe into a norovirus incident at one of its restaurants.<br />Chipotle's stock, once a Wall Street darling, has lost a third of its value since the end of October, when an E. Coli outbreak linked to its restaurants was first reported.<br />The shares were down 1.6 percent at $420.02 on Thursday.<br />Chipotle's announcement on Wednesday highlighted deepening problems at the chain, which has been plagued by a spate of food-borne illnesses among other issues since October.
