Hong Kong is taking another big step to strengthen financial-market linkages with the Middle East with the launch of Asia’s first exchange-traded fund (ETF) tracking Saudi Arabia’s Islamic government bonds, or sukuk. The ETF, called Premia BOCHK Saudi Arabia Government Sukuk ETF, started trading on the Hong Kong stock exchange on Thursday, giving local investors access to the world’s second-largest market for sharia-compliant debt securities. The ETF trades in Hong Kong dollars under code 3478...