Crude oil, up 73 percent in price this year, will remain the heaviest-weighted component, making up 14.34 percent of the 19-strong index, up from 13.75 percent in 2009, New York-based Dow Jones said in a statement dated Oct. 30.

Gold's weighting is lifted to more than 9 percent, from 7.86 percent. The weightings will be used to determine multipliers for the gauge from early January 2010. Dow Jones, a News Corp. unit, said about US$36 billion of investment tracked the index at the end of the second quarter.

The Dow Jones-UBS Commodity Total Return index has gained almost 13 percent this year, led by copper, sugar and gasoline. The S&P GSCI Total Return Index has advanced almost 12 percent this year and the Reuters/Jefferies CRB index gained almost 18 percent.