Emma Marcegaglia, chairman of Eni SpA, left, and Claudio Descalzi, chief executive officer of Eni SpA, react during the Future Of Energy Forum in Rome, Italy on Tuesday, Sept. 20, 2016. Oil has fluctuated since August's rally on speculation the Organization of Petroleum Exporting Countries and Russia will agree next week in Algiers on ways to stabilize the market. Photographer: Alessia Pierdomenico/Bloomberg via Getty Images