Also

* U.S. gasoline prices remained unchanged over the last week at a national average of $1.404 a gallon, the Energy Department said. The West Coast had the most expensive regular self-serve gasoline, although the average price in the region was down 0.1 cent a gallon to $1.541.

* Bristol-Myers Squibb Co. lost its top Aaa debt rating from Moody’s Investors Service, falling two levels to Aa2, because of delays in new products and disappointing sales at the fifth-largest drug maker.

* Altria Healthcare Corp. and Philip Morris Cos. have settled their conflict over the tobacco, food and beer conglomerate’s plan to change its name to Altria. Terms were not disclosed.

* Kathy Ordonez was named president of the Celera Genomics Group, replacing founder J. Craig Venter as head of the company best known for mapping the human genome. Ordonez was president of Celera Diagnostics, one of three operating groups, including the Celera Genomics Group, run by Norwalk, Conn.-based Applera Corp. Venter resigned in January but retained a position as scientific advisor. Ordonez will keep her responsibilities as president of Celera Diagnostics.