Spring 2006 Petroleum Fuels Price Spike: Interim Report to the Governor. By the California Energy Commission (The Commission, Sacramento, California) June 2006. 18 p.
Full Text at: www.energy.ca.gov/2006publications/CEC-600-2006-009/CEC-600-2006-009.PDF
["California drivers paid $132 million more for gasoline this spring than those in other parts of the nation, raising new questions about market manipulation.... California fuel prices have historically been higher than other parts of the nation but price increases generally reflect hikes elsewhere. The magnitude of the jump this spring, however, was not repeated anywhere else.
But state officials said they have not attempted to research the cause of the price increases and have left that question for a report due in August. They did acknowledge that market manipulation could be a factor as well as other issues such as refinery bottlenecks and market influences." San Francisco Chronicle (June 16, 2006) D1.]