Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

Share-Based Compensation

Fair value of stock options weighted-average assumptions

	Three Months Ended March 31,
	2013			2012
Weighted average fair value of options granted	$	15.96		$	22.20
Weighted average risk free interest rate	0.57		%	0.64		%
Dividend yield	0.74		%	0.00		%
Volatility (1)	51.01		%	56.02		%
Expected life	4.0 years			4.0 years

(1) Expected volatilities are based on implied volatilities from publicly traded options to purchase Nabors’ common shares, historical volatility of Nabors’ common shares and other factors.