| Cash Equivalents and Marketable Securities |
Cash Equivalents and Marketable Securities The following is a summary of cash equivalents and marketable securities: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Jul 28, 2024 | | Amortized Cost | | Unrealized Gain | | Unrealized Loss | | Estimated Fair Value | | Reported as | | | | | | | Cash Equivalents | | Marketable Securities | | | | | | | | | | | | | | | (In millions) | | Debt securities issued by the U.S. Treasury | $ | 14,051 | | | $ | 42 | | | $ | (10) | | | $ | 14,083 | | | $ | 2,132 | | | $ | 11,951 | | | Corporate debt securities | 11,994 | | | 37 | | | (7) | | | 12,024 | | | 682 | | | 11,342 | | | Money market funds | 5,252 | | | — | | | — | | | 5,252 | | | 5,252 | | | — | | | Debt securities issued by U.S. government agencies | 2,461 | | | 7 | | | (2) | | | 2,466 | | | 50 | | | 2,416 | | | Certificates of deposit | 141 | | | — | | | — | | | 141 | | | 32 | | | 109 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Total marketable securities with fair value adjustments recorded in other comprehensive income | $ | 33,899 | | | $ | 86 | | | $ | (19) | | | $ | 33,966 | | | $ | 8,148 | | | $ | 25,818 | | | Publicly-held equity securities (1) | | | | | | | $ | 419 | | | $ | — | | | $ | 419 | | | Total | $ | 33,899 | | | $ | 86 | | | $ | (19) | | | $ | 34,385 | | | $ | 8,148 | | | $ | 26,237 | |
(1) Fair value adjustments on publicly-held equity securities are recorded in net income. In the second quarter of fiscal year 2025, publicly-held equity securities from investments in non-affiliated entities were classified in marketable securities on our Condensed Consolidated Balance Sheets. For the second quarter and first half of fiscal year 2025, net unrealized gains on investments in publicly-held equity securities were $132 million and $181 million, respectively. For the second quarter and first half of fiscal year 2024, net unrealized gains on investments in publicly-held equity securities were not significant. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Jan 28, 2024 | | Amortized Cost | | Unrealized Gain | | Unrealized Loss | | Estimated Fair Value | | Reported as | | | | | | | Cash Equivalents | | Marketable Securities | | | | | | | | | | | | | | | (In millions) | | Corporate debt securities | $ | 10,126 | | | $ | 31 | | | $ | (5) | | | $ | 10,152 | | | $ | 2,231 | | | $ | 7,921 | | | Debt securities issued by the U.S. Treasury | 9,517 | | | 17 | | | (10) | | | 9,524 | | | 1,315 | | | 8,209 | | | Money market funds | 3,031 | | | — | | | — | | | 3,031 | | | 3,031 | | | — | | | Debt securities issued by U.S. government agencies | 2,326 | | | 8 | | | (1) | | | 2,333 | | | 89 | | | 2,244 | | | Certificates of deposit | 510 | | | — | | | — | | | 510 | | | 294 | | | 216 | | | Foreign government bonds | 174 | | | — | | | — | | | 174 | | | 60 | | | 114 | | | | | | | | | | | | | | | | | | | | | | | | | | | Total marketable securities with fair value changes recorded in other comprehensive income | $ | 25,684 | | | $ | 56 | | | $ | (16) | | | $ | 25,724 | | | $ | 7,020 | | | $ | 18,704 | |
The following tables provide the breakdown of unrealized losses, aggregated by investment category and length of time that individual debt securities have been in a continuous loss position: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Jul 28, 2024 | | | Less than 12 Months | | 12 Months or Greater | | Total | | | Estimated Fair Value | | Gross Unrealized Loss | | Estimated Fair Value | | Gross Unrealized Loss | | Estimated Fair Value | | Gross Unrealized Loss | | | | | | | | | | | | | | | (In millions) | | Debt securities issued by U.S. government agencies | $ | 4,031 | | | $ | (8) | | | $ | 857 | | | $ | (2) | | | $ | 4,888 | | | $ | (10) | | | Corporate debt securities | 3,170 | | | (5) | | | 396 | | | (2) | | | 3,566 | | | (7) | | | Debt securities issued by the U.S. Treasury | 1,210 | | | (1) | | | 117 | | | (1) | | | 1,327 | | | (2) | | | Total | $ | 8,411 | | | $ | (14) | | | $ | 1,370 | | | $ | (5) | | | $ | 9,781 | | | $ | (19) | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Jan 28, 2024 | | | Less than 12 Months | | 12 Months or Greater | | Total | | | Estimated Fair Value | | Gross Unrealized Loss | | Estimated Fair Value | | Gross Unrealized Loss | | Estimated Fair Value | | Gross Unrealized Loss | | | | | | | | | | | | | | | (In millions) | | Debt securities issued by the U.S. Treasury | $ | 3,343 | | | $ | (5) | | | $ | 1,078 | | | $ | (5) | | | $ | 4,421 | | | $ | (10) | | | Corporate debt securities | 1,306 | | | (3) | | | 618 | | | (2) | | | 1,924 | | | (5) | | | Debt securities issued by U.S. government agencies | 670 | | | (1) | | | — | | | — | | | 670 | | | (1) | | | Total | $ | 5,319 | | | $ | (9) | | | $ | 1,696 | | | $ | (7) | | | $ | 7,015 | | | $ | (16) | |
Gross unrealized losses are related to fixed income securities, driven primarily by changes in interest rates. The amortized cost and estimated fair value of debt securities included in cash equivalents and marketable securities are shown below by contractual maturity. | | | | | | | | | | | | | | | | | | | | | | | | | Jul 28, 2024 | | Jan 28, 2024 | | Amortized Cost | | Estimated Fair Value | | Amortized Cost | | Estimated Fair Value | | | | | | | | | | (In millions) | | Less than one year | $ | 15,535 | | | $ | 15,532 | | | $ | 16,336 | | | $ | 16,329 | | | Due in 1 - 5 years | 18,364 | | | 18,434 | | | 9,348 | | | 9,395 | | | | | | | | | | | Total | $ | 33,899 | | | $ | 33,966 | | | $ | 25,684 | | | $ | 25,724 | |
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