LONDON, Sept. 29 — Politics and worries about oil supplies may have caused gasoline prices to go up at the pump earlier this year, but one big investment bank quietly helped their rapid drop in recent weeks, according to some economists, traders and analysts.
Goldman Sachs, which runs the largest commodity index, the G.S.C.I., said in early August that it was reducing the index’s weighting in gasoline futures significantly. The announcement did not make big headlines, but it has reverberated through the markets in the weeks since and some other investors who had been betting that gasoline would rise followed suit on their weightings.
“They started unwinding their positions, and those other longs also rushed to the door at the same time,” said Lawrence J. Goldstein, president of the Petroleum Industry Research Foundation.
Wholesale prices for New York Harbor unleaded gasoline, the major gasoline contract traded on the New York Mercantile Exchange, dropped 18 cents a gallon on Aug. 10, to $1.9889 a gallon, a decline of more than 8 percent, and they have dropped further since then. In New York on Friday, gasoline futures for October delivery rose 4.81 cents, or 3.2 percent, to $1.5492 a gallon. Prices have fallen 9.4 percent this year.
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http://www.nytimes.com/2006/09/30/business/30trading.html?dlbk