"Renewable fuels and clean energy, a sector beaten down hard since last fall, are now primed for a major comeback," says Eric Roseman, editor of The Commodity Trend Alert. Here's his ETF play on the sector.

"With every passing day the price of crude oil rises, the secular trend to alternative energy becomes even more powerful. Consumers, companies and governments are now sick and tired of soaring energy prices.

"The long-term solution is to obviously reduce our dependence on oil and increase our consumption of renewable fuels like wind, solar, and nuclear energy.

"The bull market in alternative energy began in 2005 when a host of companies in this thriving sector went public, supported by government subsidies, especially in Germany and Spain. Interestingly, Germany and Spain have just reduced solar energy subsidies this spring.

"In my view, those subsidy cuts don't matter at this stage. When companies in the solar sector are making money, why should governments continue subsidizing them?

"The leading solar companies are now highly profitable and though competition remains intense amid rising costs for traditional solar panels like photovoltaic cells, new technologies are emerging like thin cells to make production cheaper.

"The industry is maturing, evolving and with everyone tired of expensive gas prices, this theme is just incredibly cheap now compared to richly-priced oil stocks. Solar and nuclear are especially exciting at these bombed-out levels.

"We're now recommending purchase of a great portfolio of diversified world-class companies called the Claymore/MAC Global Solar Energy Index ETF (NYSE: TAN).

"TAN now trades 7% below its IPO price in April - and adjusted for the highs the companies in the fund traded last fall, it's even cheaper!

"I really like the portfolio's diversified composition including big positions in China, Germany, the United States, Spain, and Norway - all leaders in this area. The ETF is inexpensive, charging 0.65% annually and offers good daily liquidity."

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