Barack Obama’s signature health-care law is struggling for one overriding reason: Selling mispriced insurance is a precarious business model. Aetna Inc. dealt the Affordable Care Act a severe setback by announcing Monday it would drastically reduce its participation in its insurance exchanges. Its reason: The company was attracting much sicker patients than expected. Indeed, all five of the largest national insurers say they are...

Source: Wall Street Journal August 17, 2016 16:56 UTC