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Equity securities and other investments (Details) - CNY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
Equity securities and other investments and fair value disclosure |  |  |
Original cost | ¥ 230,848 | ¥ 212,906 |
Cumulative net gains (losses) | 1,436 | 34,122 |
Carrying value | 232,284 | 247,028 |
Net unrealized gains (losses) recognized during the period for equity securities still held as of the end of the period | (25,587) | 45,139 | ¥ (15,264)
Investments in privately held companies recorded using measurement alternative | 99,270 | 96,946 |
Cumulative upward adjustments | 26,759 | 16,351 |
Cumulative impairments and downward adjustments | 27,827 | 24,008 |
Upward adjustments | 19,159 | 6,061 |
Impairments and downward adjustments | 7,603 | 8,042 |
Debt securities, Held-to-maturity, allowance for credit loss | 4,336 | 1,110 |
Impairment losses on debt investments | 3,225 | 175 | 890
Listed equity securities |  |  |
Equity securities and other investments and fair value disclosure |  |  |
Original cost | 93,599 | 83,099 |
Cumulative net gains (losses) | 9,661 | 41,742 |
Carrying value | 103,260 | 124,841 |
Investments in privately held companies |  |  |
Equity securities and other investments and fair value disclosure |  |  |
Original cost | 110,096 | 107,395 |
Cumulative net gains (losses) | (859) | (6,708) |
Carrying value | 109,237 | 100,687 |
Debt investments |  |  |
Equity securities and other investments and fair value disclosure |  |  |
Original cost | 27,153 | 22,412 |
Cumulative net gains (losses) | (7,366) | (912) |
Carrying value | 19,787 | 21,500 |
Convertible and exchangeable bonds |  |  |
Equity securities and other investments and fair value disclosure |  |  |
Debt investments | 8,339 | 11,343 |
Aggregate fair value was (lower) higher than their aggregate unpaid principal balance | (3,248) | 90 |
Unrealized gains (losses) recorded | ¥ (3,112) | ¥ 1,573 | ¥ (1,651)

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