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Trading Securities
 12 Months Ended
Dec. 31, 2019
Debt Securities, Trading and Available-for-sale [Abstract]  
Trading Securities Trading Securities
The estimated fair value of trading securities as of December 31, 2019 and 2018, was as follows:
 
2019

 
2018

U.S. obligations – Treasury securities
$
1,762

 
$
—

GSEs – Federal Farm Credit Bank (FFCB) bonds
—

 
656

MBS – Other U.S. obligations – Ginnie Mae
4

 
5

Total
$
1,766

 
$
661


The net unrealized gain/(loss) on trading securities was $(2), $(2), and de minimis, for the years ended December 31, 2019, 2018, and 2017, respectively. These amounts represent the changes in the fair value of the securities during the reported periods.