Stock markets have fallen after a sharp decline in Chinese shares, while oil and gold prices have increased as tensions rise in the Middle East.
Trading in China's main stock markets ended early on Monday after the indexes tumbled 7%.
Minister of State for Petroleum Resources, Ibe Kachikwu, has said that the Port Harcourt refinery would start production in the next one week.
The minister made the statement during his Christmas visit to the plant in Alesa Eleme in Rivers State on Friday.
Nigeria’s Petroleum Minister of State, Emmanuel Kachikwu, has said that the West African country would reduce gasoline costs and scrap a fuel subsidy under a pricing mechanism to come into effect from January.