Activist Ackman calls Chipotle relationship 'extremely constructive'

Shares in Chipotle were up 6 percent at $391.70 in midday trading, buoyed by Ackman's comments and the expectation that the company could benefit from business-friendly tax reforms expected to be championed by President-elect Donald Trump. Ackman's Pershing Square Capital Management announced a nearly 10 percent stake in Chipotle in September. In October, Reuters reported that Chipotle had hired a top Wall Street law firm, investment banks and a public relations shop to help defend itself agains