"Takeover speculation might be all the rage in the water sector, however Pennon dipped 13 to 651½p as Goldman Sachs downgraded it to sell from neutral, arguing that the market has already priced in a bid premium and that the shares could tumble if no actual deal emerges."
http://www.telegraph.co.uk/money/main.jhtml?xml=/money/2008/02/13/cxmktrep113.xml