There were big increases in refining capacity in the US, china, KSA and UAE
When there is a shortage and big price increase like over the last 10 years, biz invests to profit... when money is at the same time virtually free, it seems a foregone conclusion that some or lots of investment will be overdone.
I'm not gonna blame China for the whole commodity situation but they certainly added to it by pushing their big growth agenda beyond what it might have been "naturally".



