Cincinnati-based grocer Kroger announced on Monday the abrupt resignation of its CEO Rodney McMullen, citing "personal conduct" that was inconsistent with company policy as the reason for his ousting.

Chris Brigati, chief investment officer and managing director of SWBC, said the sudden resignation of Kroger CEO Rodney McMullen for an ethics violation should force the grocery chain to put more checks in place so that there is "nothing further throughout the company that can be disruptive.

The conduct is not related to financial performance, operations or reporting, and it did not involve any Kroger associates, the company said.