Short sleepers consumed the most calories, followed by normal sleepers, then very short sleepers.

CNN: Does your diet influence how well you sleep?

One possibility is that the economy will start returning to normal, in which case short-term interest rates will rise and bond markets will suffer.

ECONOMIST: Watch out for currency confusion

The "zigzag" movement of prices rising and falling in short order was normal, she said, and a sign of the intense price competition on the market.

BBC: Holiday fuel rise fury