"I've long believed that China's currency is due to appreciate notably against the buck," says currency expert Jack Crooks, upon returning from speaking at a Forex seminar in Beijing.

In his World Currency Alert he explains, "Until now, there's been no straight-forward, highly-liquid way to play it. Now there is: the WisdomTree Chinese Yuan Fund (NYSE: CYB)."

"I now think it makes sense to secure some exposure to the Chinese yuan. There's been a major U.S.-China dynamic that's drastically altered the global economic landscape over the last several years. It goes a little something like this:

• China sends goods to the U.S.
• The U.S. sends dollars to China.
• China sends dollars back to U.S.
• The U.S. sends treasuries to China.

"Ultimately, China supplies the globe with liquidity. Behind this capital flow is an artificially undervalued Chinese yuan. This exchange rate situation is why China has become a major supplier of goods and capital to the rest of the world.

Based in London, Nick Vardy is among the leading international stock experts. The editor of The Global Bull Market Alert has created a package of stocks called the "Ultimate Defensive Global Bull Market Alert" Portfolio -- using ETFs to go short on China and the British pound while simultaneously going long on agriculture and the yen.

"UltraShort FTSE/Xinhua China 25 ProShares (ASE: FXP) has been a hero during market weakness. While the market's current focus is on the exposure of Chinese banks to U.S. subprime loans, the real issue in Chinese banks is their own bad loans to state-owned enterprises. China has a long way to fall.

"Short the CurrencyShares British Pound Sterling Trust (NYSE: FXB). With the U.K.'s fundamentals perhaps weaker than the United States, the U.K. currency should continue to weaken over the coming months.

"PowerShares DB Agriculture (NYSE: DBA) invests in some of the most liquid and widely traded agricultural commodities, corn, wheat, soy beans and sugar.

"Buy the Currency Shares Japanese Yen Trust (NYSE: FXY). The yen zigs when the rest of the market zags. A position in the Yen won't knock your socks off in terms of performance. But it will hold up well in times of turmoil and appreciate steadily as the 'carry trade' unwinds.

"A word of warning: This is a 'defensive' global portfolio that will hold up the best during periods of negative market sentiment. But understand that this is also the part of the portfolio that will underperform -- perhaps significantly -- on any 'relief rally' in the markets."

Each day, Steven Halpern's TheStockAdvisors.com offers the latest market commentary and favorite investment ideas from the nation's leading financial newsletter advisors.

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.

In his Forbes ETF Trader, Jim Lowell says his top 2008 speculative bet is PowerShares DB G10 Currency Harvest Fund (ASE: DBV).

"This exchange-traded fund is a unique way to play the bank shot of the wildly volatile currency markets. It seeks investment results that correspond to the price and yield performance of the Deutsche Bank G10 Currency Future Harvest Index.

"This index is intended to take advantage of the fact that currencies associated with high-interest rates tend to rise in value relative with those associated with low-interest rates.

"The ten currencies that the index selects from are the US dollar, the euro, Japanese yen, Canadian dollar, Swiss franc, British pound, Australian dollar, New Zealand dollar, Norwegian krone, and Swedish krona.

"The upshot: interest rates are always rising in one of the above economies while falling in another -- 2008 will be no different."

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.