ALBAWABA — Shares of United Arab Emirates' ADNOC Gas surged 18.6 percent on Monday in their debut in a $2.5 billion initial public offering that aims to tap into growing global gas demand. ADNOC Gas rose 24.9 percent on the Abu Dhabi Securities Exchange to hit 2.96 dirhams after opening at 2.37 dirhams and settled at 2.81 dirhams at the end of the trading day. The ADX’s biggest IPO to ...