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Earnings per share
12 Months Ended
Dec. 31, 2020
Basic earnings per share [abstract]  
Earnings per share [Text Block]

25. Earnings per share

    Year ended  
    Dec. 31, 2020     Dec. 31, 2019  
             
Basic and diluted weighted average common shares outstanding   261,272,151     261,272,151  

The determination of the diluted weighted-average number of common shares excludes the impact of 1,292,840 weighted-average stock options outstanding that were anti-dilutive for the year ended December 31, 2020 (December 31, 2019 - nil).

For periods where Hudbay records a loss, Hudbay calculates diluted loss per share using the basic weighted average number of shares. If the diluted weighted average number of shares were used, the result would be a reduction in the loss, which would be anti-dilutive. For the year ended December 31, 2020 and 2019, Hudbay calculated diluted loss per share using 261,272,151 common shares.