BOEING CO | 2013 | FY | 3

The fair values of options were estimated using the Black-Scholes option-pricing model with the following assumptions:
Grant Year
Grant Date
 
Expected Life
 
Expected Volatility

 
Expected Dividend Yield

 
Risk Free Interest Rate

 
Weighted-Average Grant Date Fair Value Per Share

2013
2/25/2013
 
6 years
 
29.0
%
 
2.6
%
 
1.0
%
 

$15.85

2012
2/27/2012
 
6 years
 
29.9
%
 
2.4
%
 
1.1
%
 

$16.89

2011
2/22/2011
 
6 years
 
29.8
%
 
2.3
%
 
2.5
%
 

$17.96

us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock