Embedded derivatives (Tables)

12 Months Ended

Dec. 31, 2017

Sociedad Minera Cerro Verde S.A.A. [Member]

Disclosure Of Embedded derivatives [Line Items]

Disclosure of detailed information about embedded derivatives [text block]

As discussed in Note 2(d), the Company’s sales create exposure to changes in the market prices of copper and molybdenum which are considered embedded derivatives. As of December 31, 2017 and 2016, information about the Company’s embedded derivatives is as follows:

As of December 31, 2017

Pounds

payable

Maturity

Provisional pricing

Forward pricing

Fair value provision

(000)

US$

US$(000)

Copper Concentrate

252,830

January 2018 to May 2018

Between 2.903 and 3.166

Between 3.274 and 3.297

62,870

Copper Cathode

2,756

January 2018

Between 2.970 and 3.246

3.274

179

Molybdenum

3,340

January 2018 to February 2018

Between 7.229 and 7.231

8.950

5,687

68,736

As of December 31, 2016

Pounds

payable

Maturity

Provisional pricing

Forward pricing

Fair value provision

(000)

US$

US$(000)

Copper Concentrate

344,787

January 2017 to May 2017

Between 2.091 and 2.656

Between 2.507 and 2.512

68,130

Copper Cathode

7,936

January 2017

Between 2.488 and 2.678

2.507

(1,000)

Molybdenum

3,455

January 2017 to February 2017

Between 5.431 and 5.484

5.542

319

67,449