Dexus raises stakes on CPA THE GPT Group is tipped to raise the stakes in the battle for the Commonwealth Property Office Fund after yesterday's highly anticipated move by Dexus Property Group and its partner, the Canada Pension Plan Investment Board, to trump their earlier bid for the target, sweetening the offer to $2.98 billion. The contest for the office fund, which has the ticker code CPA, could end with its shareholders walking away with as much as $1.30 a security, in a deal in which the winning party would spend more than $3bn.