OREANDA-NEWS. National Rating Agency has affirmed its ‘AA+’ financial reliability rating on AMC Aton-Management. The outlook for the rating is Stable. The company was assigned NRA’s first-time rating of ‘AAA’ on June 18, 2009. The latest rating action on ATON-Management (the ‘AA+’ reliability rating affirmation with a stable outlook) was on July 28, 2015.