KUALA LUMPUR (AFX-ASIA) – Local brokerage Hwang-DBS Securities Bhd said this is a good opportunity to buy Petra Perdana Bhd as its share price has fallen 27% from its RM13.90 a share year-high. (US$1=RM3.8). In its notes, the brokerage said the oil and gas company is well-positioned to secure at least RM1 billion of a…