Supreme Petrochem has informed the exchanges that India Ratings and Research (India-Ra) has upgraded its long-term issuer ratings to ‘IND A+’ from ‘IND A’. The outlook is stable. The agency has also upgraded Supreme Petrochem’s bank facilities - ₹100 crore fund-based limits and ₹1,120 crore non-fund based limits to ‘IND A+’/Stable/’IND A1+’ from ‘IND A’/’IND A1’. Shares of Supreme Petrochem closed 0.56 per cent higher at ₹206.20 on the BSE.