ALSO. . .
* Seven of the biggest U.S. energy trading companies, including Williams Cos. and a unit of the Royal Dutch/Shell Group, have agreed to create an online trading site called TradeSpark. TradeSpark is expected to start trading natural gas, electricity, coal, weather derivatives and emission credits Oct. 2, said a spokesman for ESpeed, an operator of electronic marketplaces that will also be a partner in TradeSpark. ESpeed, controlled by the investment firm Cantor Fitzgerald, will run the New York-based exchange.
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