Why WPP Stock Crushed it on Monday

Some investors clearly believe it'll soon change hands to new ownership.Is storied advertising company WPP (WPP +7.02%) for sale?On Monday, stock investors seemed to think so, as many of them snapped up the company's shares on media speculation of a looming buyout offer. WPP ended the day with a nearly 7% gain, which looked particularly good when compared to the S&P 500 index's 0.9% drop. Talking about a big buyOn Saturday, U.K. newspaper The Times reported that at least one suitor has held talks with WPP m ...