Anthem to buy Cigna, creating biggest U.S. health insurer

Reuters - Anthem Inc said on Friday it would buy Cigna Corp for about $54.2 billion, creating the largest U.S. health insurer by membership and accelerating the industry's consolidation from five national players to three.

The proposed acquisition, the health insurance industry's largest, comes three weeks after Aetna Inc agreed to buy Humana Inc for $37 billion.  Read more.