Advisers' confidence in the economy and stock market improved in December, according to Rydex AdvisorBenchmarking.

The Rockville, Md., company's adviser confidence index, which gauges views of the U.S. economy and stock markets, rose 2%, to 83.57, from a month earlier.

"We believe the recent global deleveraging has created a once-in-a-decade opportunity in many commodities, with agricultural commodities at the top of our list," said James Dailey of Team Financial Managers.

Two of the four economic elements that are used to calculate the Rydex advisor confidence index increased in December. Advisers were most optimistic about the stock market outlook — confidence rose 4.73% — and were least confident about the longer-term economic outlook.

The Conference Board Consumer Confidence Index, which had hit an all-time low in October, improved in November, rising 18%, to 44.

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