RIO

"Rio Tinto gained 360p to a record high of £63.67 amid continuing speculation that rival BHP Billiton may increase its all-share takeover bid or add a cash sweetener. However, analysts said that it was unlikely that BHP would improve its offer at this stage, when the long-winded anti-trust process has only just begun."

http://www.telegraph.co.uk/money/main.jhtml?xml=/money/2008/04/17/cxmktrep117.xml