correlation does not equal causation, have a look at this https://en.wikipedia.org/wiki/Baltic_Dry_Index#/media/File:BDI.png https://en.wikipedia.org/wiki/Balti

correlation does not equal causation, have a look at this https://en.wikipedia.org/wiki/Baltic_Dry_Index#/media/File:BDI.png https://en.wikipedia.org/wiki/Baltic_Dry_Index#/media/File:B... no big dip around the dotcom bust, also http://www.economist.com/blogs/economist-explains/2015/03/economist-explains-7 http://www.economist.com/blogs/economist-explains/2015/03/ec...