MARC has reaffirmed its AAAID ratings on Optimal Olefins (Malaysia) Sdn Bhd’s (‘Olefins’) RM250 million Al Bai Bithaman Ajil Islamic Debt Securities (‘BaIDS’). The rating outlook is stable. The rating reflects Olefins’ strong ownership structure, its secured feedstock source and favourable feedstock price structure from Petroliam Nasional Berhad (‘Petronas...