AETNA INC /PA/ | 2013 | FY | 3


Sources of net investment income for 2013, 2012 and 2011 were as follows:
(Millions)
2013

 
2012

 
2011

Debt securities
$
768.5

 
$
763.7

 
$
829.2

Mortgage loans
99.4

 
122.4

 
102.8

Other investments
86.1

 
70.7

 
32.2

Gross investment income
954.0

 
956.8

 
964.2

Less:  investment expenses
(37.7
)
 
(34.6
)
 
(31.0
)
Net investment income (1)
$
916.3

 
$
922.2

 
$
933.2

 
 
 
 
 
 
(1) 
Net investment income includes $293.5 million, $324.2 million and $318.7 million for 2013, 2012 and 2011, respectively, related to investments supporting our experience-rated and discontinued products.

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