Unrealized Gains (Losses) on Marketable Investment Securities

$ 179,867

$ 479,812

Unrealized Gains

(151)

(276)

Accumulated net unrealized gains (losses)

(93)

(196)

Accumulated net unrealized loss, before tax, in accumulated other comprehensive income (loss)

(1,000)

Accumulated net unrealized loss, net of tax, in accumulated other comprehensive income (loss)

(1,000)

Contractual maturities of restricted and non-restricted marketable investment securities

Debt securities with contractual maturities within one year

175,000

Debt securities with contractual maturities extending longer than one year through and including five years

5,000

US Treasury and agency securities

Components of our available-for-sale investments

Unrealized Gains (Losses) on Marketable Investment Securities

71,866

84,286

Unrealized Gains

(113)

(141)

Components of our available-for-sale investments

(113)

(119)

Commercial paper

Unrealized Gains (Losses) on Marketable Investment Securities

107,962

(10)

Components of our available-for-sale investments

(10)

Corporate securities

Unrealized Gains (Losses) on Marketable Investment Securities

105,074

282,256

(37)

(124)

Components of our available-for-sale investments

(37)

(124)

Other

Unrealized Gains (Losses) on Marketable Investment Securities

2,927

5,308

Unrealized Gains

(1)

$ 57

Represents the accumulated appreciation or loss, before tax, in value of the total of available-for-sale securities at the end of an accounting period.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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