Shares of health insurance stocks may actually benefit from a repeal of Obamacare, according to one expert. According to media reports, UnitedHealth (UNH) - Get Report , Aetna (AET) and Humana (HUM) - Get Report departed from multiple Obamacare exchanges in 2017 because of the lack of profitability. "They're going to struggle to provide insurance in the individual market [if Obamacare is repealed]," said Jon Lieber, U.S. practice director at the Eurasia Group. Without the subsidies and the individual mandate of the Affordable Care Act, Lieber said few will want to purchase health insurance. As a result, the aforementioned companies may withdraw from the individual market and focus on the employer market where they will have healthier pools of people. "In some sense [an Obamacare repeal] could be positive for these stocks," he said.