November 29 (SeeNews) - Global rating agency Fitch Ratings said on Thursday it is keeping Dutch-based Rompetrol Group N.V. (TRG) long-term issuer default rating (IDR) of 'B-' on rating watch positive following the announcement that Kazakhstan-based KazMunayGaz has closed the acquisition of a 75% stake in the group from privately-owned Rompetrol Holding.