After spending over six years as CEO of Chipotle Mexican Grill (NYSE: CMG), Brian Niccol announced his departure due to his new appointment at Starbucks (NASDAQ: SBUX), starting from September 1.During his tenure, CMX stock has risen over 773%, boasting a performance that was only matched by a few other companies from the S&P 500.The effect of Niccol’s departure was immediately felt, as CMG shares closed the August 13 trading session at $51.68 after losing 7.50%. However, pre-market trading shows signs of r ...