Why the falling oil price may not lead to boom

An economic boom usually follows a big drop in the oil price but this time maybe different - indicative not of oversupply but weakness in demand

There was a time when Blue Monday meant a song by New Order. These days it is the third Monday in January, allegedly the most depressing day of the year.

Whether there is any scientific basis for this claim is debatable, but for what it's worth the argument is that people feel miserable because Christmas is over, the credit card bills are arriving, it's dark when you go to work in the morning and it's dark when you head home.

Related: Janet Yellen and Fed left with face full of egg after interest rate rise blunder