The Japanese company Sumitomo Metal Mining (SMM), which owns a 31.5% stake in the Chilean copper mine Sierra Gorda, lost about $1.35 billion from the depreciation of this asset in 2017/2018? It's true?

 From the series of publications 

"So they create a fairy tales for the investor" - 
"They draw up the necessary documents
and begin to search for the simpleton..."

KGHM "SIERRA GORDA (SCM)" (Chile)

Owners: 
KGHM International 55 % (Poland)
Sumitomo Metal Mining 31,5 % (Japan)
Sumitomo Corporation 13,5 % (Japan)

The Japanese company Sumitomo Metal Mining (SMM), which owns a 31.5% stake in the Chilean copper mine Sierra Gorda, lost about $1.35 billion from the depreciation of this asset in 2017/2018? It's true?

  Ph.D. Natalia Petrovskaya

 References

1. https://www.ukrrudprom.com/news/Dobicha_medi_v_CHili_stanovitsya_vse_bolee_ubitochnoy_dlya_novic.html
2.  https://www.metalinfo.ru/ru/news/102039
3.  http://www.sgscm.cl/es/nosotros
4. https://www.smm.co.jp/E/news/release/uploaded_files/20190829_E.pdf
5.  https://kghm.com/en/our-business/projects-under-development/sierra-gorda-oxides