Warren Buffett, the billionaire chief executive and chairman of Berkshire Hathaway, has said a Greek exit from the eurozone could be constructive for the region.

“If it turns out the Greeks leave, that may not be a bad thing for the euro,” Mr Buffett told CNBC. He said that member countries could come to better agreements about fiscal policy if Greece left the single currency.

“If everybody learns that the rules mean something and if they come to general agreement about fiscal policy among members or something of the sort, they mean business, that could be a good thing,” Mr Buffett said.

He also added that there would be no “finish line” to deals like Heinz’s merger with Kraft.

“We would hope it would not be the last major transaction,” Mr Buffett said. “There is no finish line.”

He said Berkshire and private equity firm 3G Capital have not discussed other potential targets. Kraft and Heinz, backed by Berkshire and 3G, last week said they would combine in a $46bn deal.