Original article by Mark Mulligan
The Australian Financial Review – Page: 27 : 24-Jun-15

Citigroup has warned that there may be further asset impairment charges in the global mining industry, particularly in the metallurgical and coking coal sector. The firm estimates that around 90 per cent of the value of mergers and acquisitions transacted by large mining groups since 2007 has been written off. Aluminium, iron ore and nickel assets have generated the most impairment charges over the last eight years, while Rio Tinto has the highest level of impaired assets.

CORPORATES
CITIGROUP INCORPORATED, RIO TINTO LIMITED – ASX RIO, ANGLO AMERICAN PLC, VALE SA, ALCAN INCORPORATED