US stocks post weekly drop amid disappointing earnings results

US stocks slumped this week, with the Standard & Poor’s 500 Index heading toward its first monthly decline since May, as companies from 3M Co. to DuPont Co. reported disappointing quarterly results and forecasts.

via Business feed http://www.scmp.com/business/economy/article/1070981/us-stocks-post-weekly-drop-amid-disappointing-earnings-results