(Reuters) -Shares of U.S. health insurers jumped on Monday following a media report the White House was preparing to unveil ​a policy framework that would extend Affordable Care Act premium subsidies - ‌also known as Obamacare - for two years and add new eligibility limits. Shares of Centene (CNC) jumped about ‌7% and Molina Healthcare (MOH) gained around 4%, while Elevance Health climbed more than 2% in early trading. "I think this is a bit of a relief rally as the fate of ACA subsidies came under signi ...