Financial assets and liabilities at fair value (Tables)
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12 Months Ended |
Dec. 31, 2025 |
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| Disclosure of detailed information about financial instruments [abstract] |
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| Financial assets and liabilities at fair value |
| | | | | | | | | | | | | December 31, 2025 | | Skr mn | Carrying amount | Fair value | Surplus value (+) /Deficit value (–) | | Cash and cash equivalents | 7,259 | 7,259 | — | | Treasuries/governments bonds | 13,419 | 13,419 | — | | Other interest-bearing securities except loans | 43,237 | 43,237 | — | | Loans in the form of interest-bearing securities | 47,485 | 48,748 | 1,263 | | Loans to credit institutions | 22,939 | 23,304 | 365 | | Loans to the public | 200,216 | 200,566 | 350 | | Derivatives | 6,721 | 6,721 | — | | Shares | — | — | — | | Total financial assets | 341,277 | 343,254 | 1,977 | | | | | | Borrowing from credit institutions | 4,410 | 4,410 | — | | Debt securities issued | 300,222 | 300,906 | 684 | | Derivatives | 8,988 | 8,988 | — | | Total financial liabilities | 313,620 | 314,304 | 684 |
| | | | | | | | | | | | | December 31, 2024 | | Skr mn | Carrying amount | Fair value | Surplus value (+) /Deficit value (–) | | Cash and cash equivalents | 5,219 | 5,219 | — | | Treasuries/governments bonds | 4,150 | 4,150 | — | | Other interest-bearing securities except loans | 52,843 | 52,843 | — | | Loans in the form of interest-bearing securities | 48,726 | 49,951 | 1,225 | | Loans to credit institutions | 13,529 | 13,863 | 334 | | Loans to the public | 224,354 | 223,945 | -409 | | Derivatives | 10,643 | 10,643 | — | | Shares | 20 | 20 | — | | Total financial assets | 359,484 | 360,634 | 1,150 | | | | | | Borrowing from credit institutions | 8,607 | 8,607 | — | | Debt securities issued | 316,388 | 316,375 | -13 | | Derivatives | 5,227 | 5,227 | — | | Total financial liabilities | 330,222 | 330,209 | -13 |
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| Schedule of fair value measurement of assets |
Financial assets reported at amortized cost in fair value hierarchy | | | | | | | | | | | | | | | | | | | December 31, 2025 | | Loans and accounts receivable | Fair value | Carrying amount | | Skr mn | Level 1 | Level 2 | Level 3 | Total | Total | | Cash and cash equivalents | 7,259 | — | — | 7,259 | 7,259 | | Loans in the form of interest-bearing securities | — | 48,748 | — | 48,748 | 47,485 | | Loans to credit institutions | — | 23,304 | — | 23,304 | 22,939 | | Loans to the public | — | 200,566 | — | 200,566 | 200,216 | | Total financial assets in fair value hierarchy | 7,259 | 272,618 | — | 279,877 | 277,900 |
| | | | | | | | | | | | | | | | | | | December 31, 2024 | | Loans and accounts receivable | Fair value | Carrying amount | | Skr mn | Level 1 | Level 2 | Level 3 | Total | Total | | Cash and cash equivalents | 5,219 | — | — | 5,219 | 5,219 | | Loans in the form of interest-bearing securities | 648 | 49,303 | — | 49,951 | 48,726 | | Loans to credit institutions | — | 13,863 | — | 13,863 | 13,529 | | Loans to the public | — | 223,945 | — | 223,945 | 224,354 | | Total financial assets in fair value hierarchy | 5,867 | 287,111 | — | 292,978 | 291,828 |
Financial assets reported at fair value in fair value hierarchy | | | | | | | | | | | | | | | | December 31, 2025 | | Skr mn | Level 1 | Level 2 | Level 3 | Total | | Treasuries/governments bonds | 1,031 | 12,388 | — | 13,419 | | Other interest-bearing securities except loans | 21,184 | 22,053 | — | 43,237 | | Derivatives | — | 6,720 | 1 | 6,721 | | Shares | — | — | — | — | | Total financial assets in fair value hierarchy | 22,215 | 41,161 | 1 | 63,377 |
| | | | | | | | | | | | | | | | December 31, 2024 | | Skr mn | Level 1 | Level 2 | Level 3 | Total | | Treasuries/governments bonds | — | 4,150 | — | 4,150 | | Other interest-bearing securities except loans | 22,628 | 30,215 | — | 52,843 | | Derivatives | — | 10,604 | 39 | 10,643 | | Shares | 20 | — | — | 20 | | Total financial assets in fair value hierarchy | 22,648 | 44,969 | 39 | 67,656 |
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| Schedule of fair value measurement of liabilities |
Financial liabilities reported at amortized cost in fair value hierarchy | | | | | | | | | | | | | | | | | | | December 31, 2025 | | Other financial liabilities | Fair value | Carrying amount | | Skr mn | Level 1 | Level 2 | Level 3 | Total | Total | | Borrowing from credit institutions | — | 4,410 | — | 4,410 | 4,410 | | Debt securities issued | — | 284,046 | — | 284,046 | 283,362 | | Total financial liabilities in fair value hierarchy | — | 288,456 | — | 288,456 | 287,772 |
| | | | | | | | | | | | | | | | | | | December 31, 2024 | | Other financial liabilities | Fair value | Carrying amount | | Skr mn | Level 1 | Level 2 | Level 3 | Total | Total | | Borrowing from credit institutions | — | 8,607 | — | 8,607 | 8,607 | | Debt securities issued | — | 298,467 | — | 298,467 | 298,480 | | Total financial liabilities in fair value hierarchy | — | 307,074 | — | 307,074 | 307,087 |
Financial liabilities reported at fair value in fair value hierarchy | | | | | | | | | | | | | | | | December 31, 2025 | | Skr mn | Level 1 | Level 2 | Level 3 | Total | | Debt securities issued | — | 14,262 | 2,598 | 16,860 | | Derivatives | — | 7,924 | 1,064 | 8,988 | | Total financial liabilities in fair value hierarchy | — | 22,186 | 3,662 | 25,848 |
| | | | | | | | | | | | | | | | December 31, 2024 | | Skr mn | Level 1 | Level 2 | Level 3 | Total | | Debt securities issued | — | 14,456 | 3,452 | 17,908 | | Derivatives | — | 3,737 | 1,490 | 5,227 | | Total financial liabilities in fair value hierarchy | — | 18,193 | 4,942 | 23,135 |
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| Schedule of financial assets and liabilities at fair value |
Financial assets and liabilities at fair value in Level 3 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | | Skr mn | Jan 1,
2025 | Purchases/Issues | Settlements & sales | Transfers to Level 3 | Transfers from Level 3 | Gains (+) and losses (–) through profit or loss1 | Gains (+) and losses (-) through other comprehen-sive income | Currency exchange-rate effects | Dec 31,
2025 | | Debt securities issued | -3,452 | — | 414 | — | — | -32 | -22 | 494 | -2,598 | | Derivatives, net | -1,451 | — | 174 | — | — | 22 | — | 192 | -1,063 | | Net assets and liabilities | -4,903 | — | 588 | — | — | -10 | -22 | 686 | -3,661 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2024 | | Skr mn | Jan 1,
2024 | Purchases/issues | Settlements & sales | Transfers to Level 3 | Transfers from Level 3 | Gains (+) and losses (–) through profit or loss1 | Gains (+) and losses (-) through other comprehen-sive income | Currency exchange-rate effects | Dec 31,
2024 | | Debt securities issued | -8,271 | — | 4,870 | — | — | -81 | 3 | 27 | -3,452 | | Derivatives, net | -2,279 | — | 1,176 | — | — | 92 | — | -440 | -1,451 | | Net assets and liabilities | -10,550 | — | 6,046 | — | — | 11 | 3 | -413 | -4,903 | 1 Gains and losses through profit or loss, including the impact of exchange rates, are reported as net interest income and net results of financial transactions. The unrealized fair value changes for assets and liabilities, including the impact of exchange rates, held as of December 31, 2025, amounted to a Skr 10 million loss (year-end 2024: Skr 1 million gain) and are reported as net results of financial transactions. |
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| Schedule of sensitivity analysis - level 3 |
| | | | | | | | | | | | | | | | | | | | | | Assets and liabilities | December 31, 2025 | | Skr mn | Fair value | Unobservable input | Range of estimates for unobservable input | Valuation method | Sensitivity Max | Sensitivity Min | | Equity | 0 | Correlation | 0.12 - (0.12) | Option Model | 0 | 0 | | Interest rate | 0 | Correlation | 0.12 - (0.12) | Option Model | 0 | 0 | | FX | -957 | Correlation | 0.12 - (0.12) | Option Model | -17 | 17 | | Other | -106 | Correlation | 0.12 - (0.12) | Option Model | 0 | 0 | | Sum derivatives, net | -1,063 | | | | -17 | 17 | | | | | | | | | Equity | 0 | Correlation | 0.12 - (0.12) | Option Model | 0 | 0 | | | Credit spreads | 10BP - (10BP) | Discounted cash flow | 0 | 0 | | Interest rate | 0 | Correlation | 0.12 - (0.12) | Option Model | 0 | 0 | | | Credit spreads | 10BP - (10BP) | Discounted cash flow | 0 | 0 | | FX | -2,501 | Correlation | 0.12 - (0.12) | Option Model | 17 | -17 | | | Credit spreads | 10BP - (10BP) | Discounted cash flow | 10 | -10 | | Other | -97 | Correlation | 0.12 - (0.12) | Option Model | 0 | 0 | | | Credit spreads | 10BP - (10BP) | Discounted cash flow | 0 | 0 | | Sum debt securities issued | -2,598 | | | | 27 | -27 | | | | | | | | | Total effect on total comprehensive income | | | | | 10 | -10 |
| | | | | | | | | | | | | | | | | | | | | | Assets and liabilities | December 31, 2024 | | Skr mn | Fair value | Unobservable input | Range of estimates for unobservable input | Valuation method | Sensitivity Max | Sensitivity Min | | Equity | -70 | Correlation | 0.12 - (0.12) | Option Model | 0 | 0 | | Interest rate | 0 | Correlation | 0.12 - (0.12) | Option Model | 0 | 0 | | FX | -1,263 | Correlation | 0.12 - (0.12) | Option Model | -18 | 18 | | Other | -118 | Correlation | 0.12 - (0.12) | Option Model | 0 | 0 | | Sum derivatives, net | -1,451 | | | | -18 | 18 | | | | | | | | | Equity | -55 | Correlation | 0.12 - (0.12) | Option Model | 0 | 0 | | | Credit spreads | 10BP - (10BP) | Discounted cash flow | 0 | 0 | | Interest rate | 0 | Correlation | 0.12 - (0.12) | Option Model | 0 | 0 | | | Credit spreads | 10BP - (10BP) | Discounted cash flow | 0 | 0 | | FX | -3,272 | Correlation | 0.12 - (0.12) | Option Model | 18 | -18 | | | Credit spreads | 10BP - (10BP) | Discounted cash flow | 16 | -16 | | Other | -125 | Correlation | 0.12 - (0.12) | Option Model | 0 | 0 | | | Credit spreads | 10BP - (10BP) | Discounted cash flow | 0 | 0 | | Sum debt securities issued | -3,452 | | | | 34 | -34 | | | | | | | | | Total effect on total comprehensive income | | | | | 16 | -16 |
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| Schedule of fair value related to credit risk |
| | | | | | | | | | | | | | | | Fair value originating from credit risk (- liabilities increase/ + liabilities decrease) | The period’s change in fair value origination from credit risk (+ income/ - loss) | | Skr mn | December 31, 2025 | December 31, 2024 | 2025 | 2024 | CVA/DVA, net1 | -11 | -17 | 6 | 22 | OCA2 | 282 | 265 | 17 | 320 | 1 Credit value adjustment (CVA) and Debt value adjustment (DVA) reflect how the counterparties’ credit risk as well as SEK’s own credit rating affect the fair value of derivatives. 2 Own credit adjustment (OCA) reflects how the changes in SEK’s credit rating affect the fair value of financial liabilities measured at fair value through profit and loss. |
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