For several years, trading volumes in the energy sector have been calculated largely on the basis of individual energy firms’ reported volumes. But as the Enron fallout has eroded trust in companies’ figures, brokers and vendors are seeking more independent sources of data and price information.

Brett Holleman, director of business development at software vendor Kiodex in New York, says the events of the past year have forced companies to face up to the need for accurate data. “Market data is