Earnings roundup: Morningstar, Washington Post

Among the earnings stories for Friday, May 2, from AP Financial News:

NEW YORK (AP) _ Shares of Morningstar Inc. rallied in Friday morning trading after the investment-research firm's first-quarter profit jumped 32 percent and beat Wall Street's expectations, leading an analyst to raise his rating.

McLEAN, Va. (AP) _ The Washington Post Co. on Friday reported a 39 percent drop in first quarter profit, hurt by an early retirement program charge at Newsweek and a continued loss of revenue from its newspapers.

NEW YORK (AP) _ Shares of Dolby Laboratories Inc. rose sharply Friday after the audio technology company posted fiscal second-quarter earnings above Wall Street expectations on robust sales growth.

WARREN, Ohio (AP) _ Automotive components maker Stoneridge Inc. said Friday its first-quarter profit rose, helped by strong electronic sales in North America and growth in joint venture profits.

OAKBROOK, Ill. (AP) _ Federal Signal Corp., which makes fire trucks, security systems and street cleaning equipment, said Friday it swung to a first-quarter loss, primarily from a charge and a loss in its now-divested industrial tool business.

WESTFORD, Mass. (AP) _ Shares of Netscout Systems Inc., which provides network improvement equipment, soared Friday after its fourth-quarter results beat Wall Street expectations by a wide margin.