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Share-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2013
Share-Based Compensation  
Fair value of stock options weighted-average assumptions

 

 

 

Nine Months

 

 

 

Ended September 30,

 

 

 

2013

 

2012

 

Weighted average fair value of options granted

 

$

6.21

 

$

9.42

 

Weighted average risk free interest rate

 

0.71

%

0.63

%

Dividend yield

 

.82

%

0.00

%

Volatility (1)

 

51.01

%

55.77

%

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.