Unrealized Gains (Losses) on Marketable Investment Securities

479,812

117,295

1,404

(276)

(143)

Contractual maturities of restricted and non-restricted marketable investment securities

(196)

1,261

Debt securities with contractual maturities within one year

480,000

Accumulated net unrealized gains (losses)

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

(1,000)

1,000

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

(1,000)

1,000

US Treasury and agency securities

Components of our available-for-sale investments

Unrealized Gains (Losses) on Marketable Investment Securities

84,286

81,982

(141)

(132)

Components of our available-for-sale investments

(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

282,256

33,555

1,327

(124)

Components of our available-for-sale investments

(124)

1,327

Other

Unrealized Gains (Losses) on Marketable Investment Securities

5,308

1,758

(1)

(11)

$ 57

$ 53

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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