Funds: How to convert green into gold

Climate change was on the agenda in Copenhagen this week as the city played host to the latest UN summit discussing ways to tackle it. But investors who have seen clean energy stocks drop 38% on average over the past four years must wonder, politics aside, whether there is really any money in green investing.

"Investors hoping to make a quick buck from clean energy will likely end up disappointed," says Justin Modray of candidmoney.com. "Clean energy investment performance is heavily influenced by the oil price in the shorter term. If the oil price is high, then clean energy is attractive, and vice versa if it's low." The current price is around $75 a barrel a far cry from last year's peak of $147.

So, many clean-energy stocks will not do well without another price spike. But that hasn't stopped money pouring into the sector. Last year, $155bn was invested in clean-energy firms and projects worldwide, a fourfold increase since 2004, according to a report by the UN Environment Programme. And the Obama administration has set aside almost $80bn from the US stimulus package to put into renewable energy and clean-technology incentives.

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Some funds have duly prospered. For example, the Schroders Global Climate Change Fund is up 35.1% over one year, and the Jupiter Green Investment Trust is up 14%. But there's a catch. With holdings such as Cranswick, the free-range and organic-sausage producer, the Jupiter fund is hardly a pure play on green technology. And with the likes of Cisco Systems and Honda among its top ten holdings, neither is the Schroders fund.

The Guinness Alternative Energy Fund (00 18 00 915 6566), however, does invest in alternative energy and energy-technology firms. Top holdings include Clipper Windpower and Trina Solar. But it offers quite a ride the fund sank 67% in 2008 before rising 34% over the past 12 months. For a less volatile play, there's the Impax Environmental Markets Trust (020-7434 1122), which invests in companies that provide more efficient and cleaner waste, water and energy services.

Top holdings include smart-meter stockist Itron, as well as geothermal provider Ormat Technologies and Clean Harbors, which provides hazardous-waste disposal. After a 33% drop in 2008, the fund is up 41% over one year and trades on an attractive 8% discount-to-net asset value. For a cheaper tracker, try the Powershares Global Clean Energy ETF (NYSE: PBD). It is up 7% since March, but down 14% from its 2007 high.

With politicians and a wall of cash behind it, clean investing offers great long-term prospects, but "investors should be prepared to sit tight for at least ten years and weather a few storms along the way", says Modray.