An Unlikely Spark in Alternative Energy - New York Times: "AFTER a year of stellar performance, producers of alternative energy — from ethanol to solar and wind power — took a beating in the stock market this spring.

Up more than 80 percent from May 2005 to May 8 this year, the PowerShares WilderHill Clean Energy fund, an exchange-traded fund that tracks the sector, tumbled more than 20 percent by June 30. "