Brent advanced on speculation that the drop in prices below $80 a barrel for the first time in four years increases the likelihood that OPEC will curb output. West Texas Intermediate rose the most in more than two months. Futures gained 2.5 percent in London and 2.2 percent in New York. OPEC ministers have stepped up their diplomatic visits before the group’s Nov. 27 meeting, potentially seeking a consensus on how to react to oil prices that have plunged to a four-year low. Prices may slide further in the coming months as the market enters a period of weaker demand, the International Energy Agency said today. Oil has collapsed into a bear market after leading members of the Organization of Petroleum Exporting Countries resisted calls to cut production and the U.S. shale boom lifted output to the highest level in three decades. Brent posted its eighth weekly decline, the […]