The disparity has dismayed investors, contributing to a nearly 40% drop in Yahoo's stock price since the end of 2005. Wall Street's backlash prompted Yahoo Chairman Terry Semel to step down as chief executive in June and turn over the reins to company co-founder Jerry Yang. Yahoo negotiated the Right Media acquisition while Semel was still CEO, so the BlueLithium deal represents the company's first major purchase under Yang's leadership. Yang has promised to provide further details about his turnaround plan when Yahoo announces its third-quarter earnings next month.