People attend the Future Investment Initiative conference in Riyadh, Saudi Arabia on October 24, 2017. Faisal Al Nasser / Reuters
Saudi oil minister Khalid al-Falih arrives to attend the Future Investment Initiative conference in Riyadh, Saudi Arabia on October 24, 2017. Faisal Al Nasser / Reuters
Managing director of the International Monetary Fund Christine Lagarde, centre, looks at the president and CEO of the Saudi Aramco Amin Nasser, right, during the Future Investment Initiative (FII) conference in Riyadh, on October 24, 2017. The head of oil giant Saudi Aramco said that a lack of recent investments in the oil sector could lead to a shortage of supplies. Fayez Nureldine / AFP
Participants attend the Future Investment Initiative conference in Riyadh, Saudi Arabia. Hamad I Mohammed / Reuters
Managing director of the International Monetary Fund Christine Lagarde, centre, takes part in a panel discussion during the Future Investment Initiative (FII) conference in Riyadh, on October 24, 2017. Fayez Nureldine / AFP
Amin Nasser, president and chief executive of Aramco arrives to the Future Investment Initiative conference in Riyadh, Saudi Arabia, on October 24, 2017. Hamad I Mohammed / Reuters
A man walks past a sign at the Future Investment Initiative conference in Riyadh, Saudi Arabia on October 24, 2017. Hamad I Mohammed / Reuters
People attend the Future Investment Initiative (FII) conference in Riyadh, on October 24, 2017. The head of oil giant Saudi Aramco said that a lack of recent investments in the oil sector could lead to a shortage of supplies. Fayez Nureldine / AFP
People attend the Future Investment Initiative conference in Riyadh, Saudi Arabia on October 24, 2017. Faisal Al Nasser / Reuters
Saudi oil minister Khalid al-Falih arrives to attend the Future Investment Initiative conference in Riyadh, Saudi Arabia on October 24, 2017. Faisal Al Nasser / Reuters
Managing director of the International Monetary Fund Christine Lagarde, centre, looks at the president and CEO of the Saudi Aramco Amin Nasser, right, during the Future Investment Initiative (FII) conference in Riyadh, on October 24, 2017. The head of oil giant Saudi Aramco said that a lack of recent investments in the oil sector could lead to a shortage of supplies. Fayez Nureldine / AFP
Participants attend the Future Investment Initiative conference in Riyadh, Saudi Arabia. Hamad I Mohammed / Reuters
Managing director of the International Monetary Fund Christine Lagarde, centre, takes part in a panel discussion during the Future Investment Initiative (FII) conference in Riyadh, on October 24, 2017. Fayez Nureldine / AFP
Amin Nasser, president and chief executive of Aramco arrives to the Future Investment Initiative conference in Riyadh, Saudi Arabia, on October 24, 2017. Hamad I Mohammed / Reuters
A man walks past a sign at the Future Investment Initiative conference in Riyadh, Saudi Arabia on October 24, 2017. Hamad I Mohammed / Reuters
People attend the Future Investment Initiative (FII) conference in Riyadh, on October 24, 2017. The head of oil giant Saudi Aramco said that a lack of recent investments in the oil sector could lead to a shortage of supplies. Fayez Nureldine / AFP
People attend the Future Investment Initiative conference in Riyadh, Saudi Arabia on October 24, 2017. Faisal Al Nasser / Reuters