David Fickling, Columnist

Bonfire of the Writedowns Just Starting

After $856 billion of reductions, mining and energy companies still have more assets than at the peak of the boom.
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What does $13 billion of burning money smell like? Commodity investors are getting a nose for it.

Japanese trading houses Mitsui, Mitsubishi, and Sumitomo have announced 767 billion yen ($6.8 billion) of writedowns on assets this year, including copper, nickel, iron-ore and natural-gas projects. PetroChina wrote 25 billion yuan ($3.8 billion) off the value of oil and gas fields that have ``no hope" of making a profit at current prices, President Wang Dongjin said last week, while Citic posted a HK$12.5 billion ($1.6 billion) impairment on an Australian iron-ore mine. Cnooc's annual results last Thursday count as a good news story against that backdrop, with impairments of 2.75 billion yuan that were lower than the previous year's.