Paulson, Loeb, Viking Suffer As Allergan-Pfizer Merger Falls Through

Allergan's stock nosedived on Monday, falling more than 20% as soon as the U.S Treasury announced its decision to pursue stricter rules to curb tax inversion mergers and buyouts. The Dublin-based pharmaceutical company was set to merge with U.S.-based Pfizer Inc. The Treasury's announcement on Monday broke down the $160 billion AGN-PFE merger which was set to make the world's largest pharmaceutical company, had it happened.

Allergan-Pfizer breakup brings millions in losses

Just as Allergan was getting burnt on Monday, a number of major hedge funds were feeling the losses. The largest shareholder among hedge funds, John Paulson, held over 5.5 million shares of Allergan at the end of 2015. Over 16% of AGN's shares are held by hedge funds. Among a sample...