AbbVie Inc. agreed to pay $63 billion for rival drugmaker Allergan Plc, the latest merger in an industry where some of the biggest companies have been willing to pay a big premium to resolve questions about their growth prospects. Abbvie stock closed down 16% to $65.70 in New York. Allergan shares finished the day up 25% to $162.43. Source: Bloomberg 25/6/2019