Core Viewpoint - WPP, the advertising agency, issued its second profit warning since July and its first under the new CEO, leading to a significant decline in its stock price [1] Company Summary - The profit warning indicates ongoing challenges for WPP, reflecting a difficult operating environment [1] - This warning marks a notable event as it is the first under the leadership of the new chief executive, suggesting potential issues with the company's strategic direction [1] - The stock's sharp decline following the announcement highlights investor concerns regarding WPP's financial health and future performance [1]