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Investments in Marketable Securities
 3 Months Ended
Mar. 31, 2020
Marketable Securities [Abstract]  
Investments in Marketable Securities
Investments in Marketable Securities
The following is a summary of the cost, gross unrealized gains, gross unrealized losses and fair value of Investments in marketable securities:
 
December 31,
2019
 
March 31,
2020
Cost
$
57.9

 
$
61.6

Unrealized gains
2.1

 
0.4

Unrealized losses
(0.6
)
 
(7.4
)
Fair value
$
59.4

 
$
54.6


For the three months ended March 31, 2019 and 2020, the Company received proceeds of $15.1 million and $26.2 million, respectively, from the sale of investments in marketable securities and recorded net gains (losses) of $0.5 million and $(1.0) million, respectively.
As of December 31, 2019 and March 31, 2020, Investments in marketable securities includes consolidated Affiliate sponsored investment products with fair values of $38.1 million and $33.2 million, respectively.