Norway's DNB Bank said Asia's offshore oil and gas stocks are at the start of a sector up-cycle, naming Singapore-listed Keppel E&P, Sembcorp Marine, STX OSV, Ezion and Jaya as its top picks.In a report last week, authors Kay Lim and Simon Jong also recommended buying Swiber, Ezra, ASL Marine, CH Offshore, KS Energy and Kreuz.
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