Also yesterday, Korea's stock market suffered its worst one-day fall ever, with the country's benchmark index falling 7.5 percent.

The euro also posted its biggest one-day fall against the pound since November 9, sliding to 84.42p.

It was the biggest one-day fall in seven years.

It was the biggest one-day fall for Omnicom's shares since the company was formed in 1986.

The loss was the biggest one-day fall for Eurotunnel shares in more than a year.

On Wall Street, shares had their biggest one-day fall in history, losing 508 points.

On Wall Street, shares suffered their biggest one-day fall in history, losing 508 points in just under three hours.

It was the biggest one-day fall in months.

The one-day fall shaved $9.2 billion from the company's market value.

The dollar had its biggest one-day fall against the euro since Sept. 11.