UnitedHealth Group (NYSE:UNH) is the nation's largest insurer and the company just put up solid second-quarter results that may suggest good news is coming from competitors, including WellPoint (NYSE: WLP).

The second quarter was particularly important to the industry given it marked the first full quarter following the close of Obamacare's first open enrollment period. 

UNH Chart

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In the following slideshow, I highlight three important quotes from UnitedHealth's CEO that offer insight into the affects of health care exchanges and Medicaid expansion.