Why aren't investors cheering AstraZeneca's bid for Alexion?
At first glance AstraZeneca's (AZN) $39.4 billion takeover offer for immunology and rare diseases specialist Alexion looks to be opportunistic and financially sound, but investors initially marked its shares down by 6%.There are a couple of reasons for the negative reaction; firstly, investors have questioned why AstraZeneca needs to go down the mergers and acquisition route when it already boasts