The deepening toll from the global financial crisis could trigger the failure of a large US bank within months, a respected former chief economist of the International Monetary Fund claimed today, fuelling another battering for banking shares.

Professor Kenneth Rogoff, a leading academic economist, said there was yet worse news to come from the worldwide credit crunch and financial turmoil, particularly in the United States, and that a high-profile casualty among American banks was highly likely.

“The US is not out of the woods. I think the financial crisis is at the halfway point, perhaps. I would even go further to say the worst is to come,” Prof Rogoff said at a conference in Singapore.

In an ominous warning, he added: “We’re not just going to see mid-sized banks go under in the next few months, we’re going to see a whopper, we’re going to see a big one — one of the big investment banks or big banks,” he said.

Rising anxieties over “worse to come” in the credit crisis sent shares tumbling in Europe and Asia.