West Texas Intermediate, the U.S. benchmark crude that plunged into a bear market this month, extended its rally to a third day amid speculation it slumped too far. Brent moved between gains and losses in London . Futures climbed as much as 0.9 percent to $83.48 a barrel in New York , having fallen as low as $79.78 on Oct. 16. Brent, the global benchmark, rose or fell through its closing level at least nine times by 9:30 a.m. in London. Goldman Sachs Group Inc. said Oct. 17 that a rout in prices had gone too far and that there were no signs of a supply glut. Iran ’s President Hassan Rouhani instructed the oil ministry to use diplomacy to halt the slide, state-run Mehr news agency reported yesterday. Saudi Arabia and Kuwait started cutting output from a joint oil field on Oct. 16. The Organization of Petroleum Exporting […]