Health care mergers in doubt as Amazon looms large

1. Health care isn’t so healthy: The fates of two giant health care mergers are suddenly in question.
Drug store chain CVS wants to buy insurer Aetna, but the California Insurance Commissioner wants the Justice Department to block the $69 billion deal, citing concerns that prices will go up and competition will decrease.
Another insurer, Cigna, hopes to buy pharmacy benefits manger Express Scripts for $67 billion. However, there were reports last week that activist investor