Petroliam Nasional Bhd (Petronas) is enjoying a twin boost as commodity prices rally and Islamic bond costs fall just as it considers borrowing. The difference in yield between 10-year government sukuk and two-year securities shrank to a five-month low of 91 basis points last week from as high as 128 in early January, making longer-term financing attractive for issuers such as Petronas. That’s been helped by record foreign purchases of ringgit government bonds last month, a rally in the currency and a recovery in Brent crude. Petronas last month posted its third loss in five quarters, announced plans to cut 1,000 jobs and said it might need to raise funds and tap cash reserves to cover capital expenditure and dividends.