AstraZeneca, Shire dive as U.S. tax move punctures deal hopes
September 23, 2014 at 11:09 AM EDT
LONDON (Reuters) - Shares in drugmakers AstraZeneca and Shire fell sharply on Tuesday after the U.S. Treasury took steps to curb "inversion" deals that allow companies to escape high U.S. taxes by reincorporating abroad.