Wall Street exposure to oil sector
http://www.bloomberg.com/news/articles/2016-04-15/wall-street-s-oil-crash-a-story-told-in-charts
A few American states are suffering due to low oil and coal prices:
http://www.bloombergview.com/articles/2016-04-15/state-economic-flu-doesn-t-seem-to-be-contagious