oct 19 reuters  origin energy ltd orgax on wednesday forecast an increase in underlying earnings for its energy markets business in fiscal 2023 helped by higher natural gas prices australias no2 power producer expects underlying earnings before interest taxes depreciation and amortization for its energy markets division between a500 million 31565 million and a650 million in fiscal 2023 compared with a365 million a year earlier reporting by harish sridharan in bengaluru editing by shounak dasgupta