WPP Group took a rare stumble in late-week selling on the Nasdaq stock exchange in New York. The price slide followed a stock split earlier in the week and news that its Ogilvy & Mather
Worldwide unit had snared a plum account: the estimated $200 million global assignment for oil industry giant BP Amoco. Steady gains had pushed WPP stock to levels more than double those of a year ago. In trading on Friday, WPP stock closed at $62.63, down 8.07% from Thursday's close and 4.39% for the week.