Gold prices have “explosive” upside potential, according to analysts, boding well for Hong Kong’s ambitions as a trading hub as Asian central banks continue to have a voracious appetite for stockpiling bullion. Supporting the outlook, Beijing – which has added to its gold reserve for 20 straight months – wants to better connect the Shanghai Gold Exchange to Hong Kong, and the South Korean central bank plans to buy gold for the first time in 13 years. “Gold remains in an explosive phase of the...