Merck & Co. Inc.
| 2013 | FY |
The weighted average fair value of options granted in
2013
,
2012
and
2011
was
$6.21
,
$5.47
and
$5.39
per option, respectively, and were determined using the following assumptions:
Years Ended December 31
2013
2012
2011
Expected dividend yield
4.2
%
4.4
%
4.3
%
Risk-free interest rate
1.2
%
1.3
%
2.5
%
Expected volatility
25.0
%
25.2
%
23.4
%
Expected life (years)
7.0
7.0
7.0
us-gaap:ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
