In this link, eminent economist and market strategist David Rosenberg highlights many of the issues that are currently contributing to ‘uncertainty’ in world markets:
For the sake of clarity, ‘uncertainty’ generally means ‘pessimism’ when used by economists. However, they should not be confused as one and the same thing.
Rosenberg lists off a number of topics that contribute to a sentiment of pessimism. Unfortunately, his argument is far too one-sided. He concludes his diatribe as follows: