 Shares of Huntsman Corp. HUN, 1.16 rose 1.1 in afternoon trading Wednesday, after the specialty chemicals companys credit rating was upgraded out of junk territory at SP Global Ratings, citing a strengthened risk profile as cost-cutting and pricing initiatives has improved profitability. SP raised Huntsmans credit rating to BBB-, which is the rating agencys lower investment-grade rating, and said the outlook for the rating was stable. 