This post is part of a special report, Top Picks for 2010, the 27th annual survey in which TheStockAdvisors.com asks the nation's leading advisors for their single favorite stock for the new year. See all 80 stocks listed here.

"When extreme valuations are accompanied by unbridled optimism or abject pessimism, it virtually always marks a turning point -- and an opportunity; and this is no exception," says Alex Green, referring to the U.S. dollar.

Here, the senior investment advisor to The Oxford Club and Investment U looks to PowerShares DB US Dollar Index Bullish ETF (UUP) as a favorite idea for the coming year.

For 25 years, Steven Halpern, editor of TheStockAdvisors.com, has surveyed the leading financial newsletter advisors asking for their favorite stocks for the coming year. This article is one of 100+ ideas in the Best Stocks for 2008 report.

"My top pick for 2008 is the PowerShares U.S. Dollar Index Bullish (ASE: UUP)," says seasonal timing expert Sy Harding in his Street Smart Investor.

"The US dollar has been in a frightful decline against most global currencies for six years now. Its decline has served the US economy well. Among other positives, the weaker dollar made US exports less expensive for foreign consumers, while making imports more expensive for US consumers.

"That has been a win-win situation for US manufacturers in a period when US manufacturing has been a struggling sector of the economy.

"The weaker dollar has made travel to the US, and shopping here, a happy experience for foreign travelers. Without purchases of second homes by foreign buyers, the plunge in the housing market would have been even more severe.