23 Earnings (loss) per share

Basic: Earnings (loss) per share is calculated by dividing net income (loss) attributable to common shareholders by the weighted average number of common shares outstanding during the year, excluding common shares purchased and held as treasury shares (shares in thousands).

Diluted: Diluted earnings (loss) per share is calculated by dividing net income (loss) of the period attributable to common shareholders by the weighted average number of common shares outstanding during the year, adjusted for the effects of all potential common shares that are dilutive when applicable and adjusted for treasury shares held.