Clean energy ETFs became hugely popular in 2007. But they’ve been taking a beating since this August, when crude oil prices began to fall from their year highs.

Nevertheless, Jim Stanton says alternative energy — and the wind-energy market in particular — has a big future. Wind energy is already the second largest source of new power generation in the US, and it now has the backing of the much-hyped Pickens Plan.

Jim says two clean-energy ETFs that look undervalued right now are PBW and GEX. He also recommends FAN for a more wind-specific ETF. 

The crisis on Wall Street has effectively stopped funding for alternative energy projects.

But an even bigger problem has been the coming expiration of energy tax credits for the manufacturing, production and use of alternative energy systems and devices at the end of 2008. This situation has now changed with the $18 billion Renewable Energy and Job Creation Act of 2008.

David Fessler at Investment U says three alternative-energy ETFs should see “big moves” in the remainder of 2008 and in 2009 on the back of the bill.

We’re standing on the tracks and the train is coming, says Wayne Mulligan. But that’s no reason for investors to not play the market. Wayne says going long on discount retailers is the best way to profit from low consumer confidence. And with fuel prices on an unsustainable uptrend, investors should look to the alternative energy market. Meanwhile, the auto industry is facing ruin. A clear opportunity for shorting, says Wayne.

Last week I promised that I’d go over some promising sectors in the green market. But the past two articles on the topic generated some important feedback that I’d like to go over with you today.