Vestas fires 3000 employees due to poor sales results and expected earnings in 2010 and 2011. This makes the stock go down. This could be a oppertunity to buy at a low price or going down in flames Vestas Performance.
As my analysis is not finished at this time it would be wrong to jump to conclusions. But it says something about the volatility (Beta) in the market and that even “green” companies can be subject to market trends.