Summary Box: Caterpillar pulls Dow higher

share: digg facebook twitter FLYING CATERPILLAR: Caterpillar drove the Dow Jones industrial average higher Friday after the company reported a huge gain in first-quarter earnings. The world's largest maker of mining and construction equipment rose 2.5 percent after its earnings increased more than five-fold. APRIL HIGHS: The Dow gained 4 percent in April, its best month since December. Stronger ...