UnitedHealth Group’s shock $425 million downgrade to its earnings forecast for 2015 was almost entirely driven by losses on the ObamaCare exchanges. UnitedHealth is the largest U.S. insurer by enrollment, and the company is warning it may withdraw from ObamaCare in 2017. The insurer has already suspended advertising for its ObamaCare coverage and stopped paying commissions to insurance brokers for signing people up.
