China devalues CNY

Today near 2:00 am BST China regulators decided to devalue their currency (renminbi, RMB) by far more than they usually did. For now USDNY is 6.32 instead of 6.21. The decision was most probably caused by worrying data from the economy of China that have been coming since mid of 2014. 
The PBoC announced it is a decision whose aim is to reflect more market forces while trading yuan.