Zynga 2014 Annual Report Download - page 91

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Table of Contents
The following tables summarize our amortized cost, gross unrealized gains and losses and fair value of our available-for-sale investments
in marketable securities (in thousands):
The estimated fair value of available-for-
sale marketable securities, classified by their contractual maturities was as follows (in thousands):
Changes in market interest rates and bond yields cause certain of our investments to fall below their cost basis, resulting in unrealized
losses on marketable securities. As of December 31, 2014, we had unrealized losses of $0.5 million related to marketable securities that had a
fair value of $621.5 million. As of December 31, 2013, we had unrealized losses of $0.3 million related to marketable securities that had a fair
value of $240.9 million. None of these securities were in a material continuous unrealized loss position for more than 12 months.
As of December 31, 2014 and 2013, we did not consider any of our marketable securities to be other-than-temporarily impaired. When
evaluating our investments for other-than-temporary impairment, we review factors such as the length of time and extent to which fair value has
been below its cost basis, the financial condition of the issuer, our ability and intent to hold the security to maturity and whether it is more likely
than not that we will be required to sell the investment before recovery of its cost basis.
88
December 31, 2014
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Aggregate
Fair Value
U.S. government and government agency debt securities
$
405,049
$
68
$
(135
)
$
404,982
Corporate debt securities
611,950
39
(365
)
611,624
Municipal securities
—
—
—
—
Total
$
1,016,999
$
107
$
(500
)
$
1,016,606
December 31, 2013
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Aggregate
Fair Value
U.S. government and government agency debt securities
$
333,632
$
160
$
(51
)
$
333,741
Corporate debt securities
731,225
356
(257
)
731,324
Municipal securities
11,376
6
—
11,382
Total
$
1,076,233
$
522
$
(308
)
$
1,076,447
December 31,
2014
December 31,
2013
Due within one year
$
785,221
$
659,973
After one year through three years
231,385
416,474
Total
$
1,016,606
$
1,076,447
December 31, 2014
December 31, 2013
Fair Value
Unrealized loss
Fair Value
Unrealized loss
U.S. government and government agency debt securities
$
222,723
$
(135
)
$
98,787
$
(51
)
Corporate debt securities
398,777
(365
)
142,071
(257
)
Total
$
621,500
$
(500
)
$
240,858
$
(308
)