Ok i know this may seem far fetchewd and i really arent normally a doom monger but many things point to this, one Brexit, 2, USA Trade war with China, 3 MASSIVE debt of developed countries, 4, governments have not been able to get themselves in a position where they have the tools to boost the economy since the world wide finicial crisis, interest rate s at rock bottom stil which i my opinion the strongest weapon in a countries armoury to control inflation and either take heat out the economy or give it a boost.
I think the world economy would prob take either brexit or a USA trade war but not both at the same time after a crippling finacial crisis.
I also think tech will be hardest hit so i am just waiting for a catalyst to short the tech equities.
By the way i aint an economist or anything really, these are simple just my ponderings and iuts likely you will think its rubbish and it may well be but i will still trade it until it breaks down and becomes impossible.