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Trading Securities
12 Months Ended
Dec. 31, 2019
Trading Securities [Member]  
Investment Holdings [Line Items]  
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure Trading Securities

MAJOR SECURITY TYPES

Trading securities were as follows (dollars in millions):
 
December 31,
 
2019
 
2018
Non-mortgage-backed securities
 
 
 
Other U.S. obligations1
$
150

 
$
159

GSE and Tennessee Valley Authority obligations
60

 
57

Other2
259

 
266

     Total non-mortgage-backed securities
469

 
482

Mortgage-backed securities
 
 
 
GSE multifamily
419

 
433

Total fair value
$
888

 
$
915


1
Represents investment securities backed by the full faith and credit of the U.S. Government.

2
Consists of taxable municipal bonds.

NET GAINS (LOSSES) ON TRADING SECURITIES

The Bank did not sell any trading securities during the years ended December 31, 2019, 2018, and 2017. During the year ended December 31, 2019, the Bank recorded net holding gains of $28 million on its trading securities, compared to net holding losses of $15 million and net holding gains of $1 million for the same periods in 2018 and 2017.