Stock markets have tanked since the FED rate hike, slowing/unclear growth in China, oil price collapse ( 5 - 6% a day ) and instability in the Middle East.
http://money.cnn.com/2016/01/15/investing/stocks-markets-dow-china-oil/index.html?iid=hp-stack-dom
https://en.wikipedia.org/wiki/Black_Monday_(1987)
Are we heading to a new Black Monday?