caption: FILE - In this Dec. 12, 2019 file photo, Saudi traders chat as they follow a screen displaying Saudi stock market values, at the Arab National Bank in Riyadh, Saudi Arabia, Dec. 12, 2019. The International Monetary Fund is warning that energy-rich <PERSON> states could burn through all their savings in the next 15 years. An IMF report released Thursday, Feb. 6, 2020, points to worries about climate change and supply from new competitors as dampening global oil prices. The IMF said those nations need to cut costs and diversify their economies. (AP Photo/ <PERSON>, File)
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