OREANDA-NEWS. National Rating Agency has affirmed its ‘AA-’ credit rating on Investneftekhim LLC. The outlook for the rating is Stable. At the same time, NRA has raised the company's stand-alone rating to 'AA-', and has withdrawn its support rating of 'RS3'. Investneftekhim was assigned NRA's first-time credit rating of 'A+' on Mar. 31, 2014. The latest rating action on the company (the 'AA-' credit rating affirmation with a stable outlook) was on June 3, 2015.