Commodities are expected to gain nearly 6 percent in three weeks, Bloomberg reports. A technical analysis by Bank of America Corp. said the Thomson Reuters/Jefferies CRB Index may achieve its 100-day moving average of 328 in two weeks and the 200-day moving average of 339 a week later.

The increase could see CRB index nearing a 50 percent reversal of its decline from July 2008 to February 2009. The CRB index, which gained 17 percent last year, is down 3.7 percent this year.

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