Shares in BlackBerry-maker RIM have touched new highs on speculation that Microsoft was contemplating making a bid for the firm.
The Blackberry is a favourite among many business people
There are rumours that Microsoft is interested in the Canadian firm after Google said it was considering making its own mobile phone operating system.
However neither firm has commented on the speculation.
RIM's shares ended up 1% at C$87.71 ($82.94; £41.18) on Thursday, having hit a record C$89.68.
However observers have questioned whether Microsoft buying RIM would make sense - not least because the firm's C$50bn valuation means it would not prove cost-effective.