US stocks slide on weak company earnings, US economic data

ROUGH QUARTER: Caterpillar's stock fell 7 percent after the heavy equipment maker was hurt in the fourth quarter by restructuring costs and issued a weak outlook. The stock shed $6.12 to $79.91. CURRENCY PAIN: Procter& Gamble fell 3 percent as the strong U.S. dollar cut into the consumer products maker's second-quarter earnings.