OREANDA-NEWS. National Rating Agency has lowered its credit rating on RKB Bank JSC to 'BBB' and took it off its Watchlist, revising the rating outlook from Indefinite to Stable. The bank was assigned NRA's first-time credit rating of 'A-' on July 29, 2015. The latest rating action on RKB Bank (rating downgrade to 'BBB+' and Watchlist placement with indefinite implications) was on Apr. 29, 2016.