NEW YORK (TheStreet) -- American Express Company, Kraft Foods, Merck & Company and Hewlett-Packard emerged top gainers; ExxonMobil, Chevron, Caterpillar and EI du Pont closed in the red. American Express gained 2.3%, topping the Dow 30 list last week. Kraft rose 1.5% after the company announced revenue guidance above analysts' estimates. Revenue for the March quarter was $12.57 billion, 11.1% higher than the same period last year and topping analysts' consensus estimate of $12.33 billion.