"Among the fallers was water group Pennon, down 13p to 651.5p after Goldman Sachs downgraded from neutral to sell. "In our view, Pennon's shares are pricing in significant scope for a bid at historic premiums, which we believe is no longer justified under the current credit market conditions," said Goldman's Jenny Ping and Andrew Mead."
http://www.guardian.co.uk/business/2008/feb/13/marketforces