Low oil prices

I would argue that falling commodity prices are bad news. It likely means that the debt bubble which has been holding up the world economy for a very long time–since World War II, at least–is failing to expand sufficiently. If the debt bubble collapses, we will be in huge difficulty.

~ Gail Tverberg from, http://ourfiniteworld.com/2014/09/21/low-oil-prices-sign-of-a-debt-bubble-collapse-leading-to-the-end-of-oil-supply/