In this Nov. 23, 2015, file photo, traders James Matthews, left, and John Panin work at the post that handles Pfizer, on the floor of the New York Stock Exchange. Allergan and Pfizer called off Wednesday, April 6, 2016, a record $160 billion merger after the Treasury issued new rules to make "tax inversions" less lucrative. (AP Photo/Richard Drew, File)
Featured Photo Galleries
