Share-based compensation plans (Tables)

9 Months Ended

Sep. 30, 2012

Stock option plans

Share-based compensation plans

Schedule of estimated fair value of stock options on the grant date

The estimated fair value of share options and deferred shares at March 9, 2012 using the Black-Scholes option pricing model was based on the following assumptions:

	Share options			Deferred shares with performance criteria
Expected share price volatility	58		%	59		%
Risk-free interest rate	1.69		%	0.47		%
Expected annual dividends per share	$	0.00		$	0.00
Expected life of awards	8 years			3 years

Deferred shares without performance criteria

Share-based compensation plans

Schedule of estimated fair value of stock options on the grant date

The estimated fair value of share options at June 7, 2012 using the Black-Scholes option pricing model was based on the following assumptions:

	Share options
Expected share price volatility	58		%
Risk-free interest rate	1.07		%
Expected annual dividends per share	$	0.00
Expected life of share options	8 years