United States Oil Fund ( USO) -1.5%

Oil prices retreated during Monday's trading, dipping below $85 per barrel. Concerns regarding the Greece bailout helped pressure the euro against the dollar, making the commodity more expensive for Europeans.

USO had a nice weeklong run heading into April that helped power the ETF to new 2010 highs. However, since the start of the month, the fund's performance has been noticeably choppy, dipping close to its 50-day moving average.

Market Vectors Vietnam ETF ( VNM) -1.4%

The wildly volatile Vietnam ETF is taking a hit today after two consecutive days of gains.

Looking to the future, inflation may prove to be a weight on this nation's markets. According to a report from Citigroup ( C), there is a good chance that Vietnam's inflation could surpass 10% this year.

All prices as of 2:15 p.m. EST

-- Written by Don Dion in Williamstown, Mass.
At the time of publication, Dion does not own any of the equities mentioned.

Don Dion is president and founder of Dion Money Management, a fee-based investment advisory firm to affluent individuals, families and nonprofit organizations, where he is responsible for setting investment policy, creating custom portfolios and overseeing the performance of client accounts. Founded in 1996 and based in Williamstown, Mass., Dion Money Management manages assets for clients in 49 states and 11 countries. Dion is a licensed attorney in Massachusetts and Maine and has more than 25 years' experience working in the financial markets, having founded and run two publicly traded companies before establishing Dion Money Management.

Dion also is publisher of the Fidelity Independent Adviser family of newsletters, which provides to a broad range of investors his commentary on the financial markets, with a specific emphasis on mutual funds and exchange-traded funds. With more than 100,000 subscribers in the U.S. and 29 other countries, Fidelity Independent Adviser publishes six monthly newsletters and three weekly newsletters. Its flagship publication, Fidelity Independent Adviser, has been published monthly for 11 years and reaches 40,000 subscribers.

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