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Investment securities
 6 Months Ended
Jun. 30, 2023
Investment securities
10 Investment securities
end of 6M23 2022
Investment securities (CHF million)   
Debt securities held-to-maturity 1,498 921
Debt securities available-for-sale 854 796
Total investment securities  2,352 1,717
Investment securities by type
   6M23 2022

end of
Amortized
cost 		Allowance
for credit
losses 		Gross
unrealized
gains 		Gross
unrealized
losses
Fair
value
Amortized
cost 		Allowance
for credit
losses 		Gross
unrealized
gains 		Gross
unrealized
losses
Fair
value
Investment securities by type (CHF million)   
Foreign governments 1,498 0 0 31 1,467 921 0 0 40 881
Debt securities held-to-maturity  1,498 1 0 0 31 1,467 921 1 0 0 40 881
Corporate debt securities 1,004 0 0 150 854 952 0 0 156 796
Debt securities available-for-sale  1,004 2 0 0 150 854 952 2 0 0 156 796
1
Excludes accrued interest on debt securities held-to-maturity of CHF 18 million and CHF 10 million as of the end of 6M23 and 2022, respectively, with no related allowance for credit losses. Accrued interest is reported in other assets in the consolidated balance sheet.
2
Excludes accrued interest on debt securities available-for-sale of CHF 4 million and CHF 1 million as of the end of 6M23 and 2022, respectively. Accrued interest is reported in other assets in the consolidated balance sheet.
Gross unrealized losses on debt securities and related fair value
   Less than 12 months 12 months or more Total

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Fair
value 		Gross
unrealized
losses
Fair
value 		Gross
unrealized
losses
Fair
value 		Gross
unrealized
losses
6M23 (CHF million)   
Corporate debt securities 179 6 666 144 845 150
Debt securities available-for-sale  179 6 666 144 845 150
2022 (CHF million)   
Corporate debt securities 374 58 404 98 778 156
Debt securities available-for-sale  374 58 404 98 778 156
Unrealized losses on debt securities as of the end of 6M23 relate to thirteen high-quality debt security positions held for liquidity purposes. The Bank does not intend to sell these investments nor is it more likely than not that the Bank will be required to sell these securities before the recovery of their amortized cost basis, which may be at maturity. Management determined that the unrealized losses on these debt securities were attributable to changes in market valuation driven by interest rate movements and not to credit-related factors. As a result, no impairment charges were recorded in the consolidated statements of operations.
> Refer to “Note 13 – Financial instruments measured at amortized cost and credit losses” for further information on debt securities held-to-maturity.
Proceeds from sales, realized gains and realized losses from debt securities available-for-sale
in 6M23 6M22
Sales of debt securities available-for-sale (CHF million)   
Proceeds from sales 0 45
Realized losses 0 (6)
Amortized cost, fair value and average yield of debt securities
    Debt securities
held-to-maturity 		Debt securities
available-for-sale

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Amortized
cost
Fair
value 		Average
yield
(in %)
Amortized
cost
Fair
value 		Average
yield
(in %)
6M23 (CHF million)   
Due within 1 year 0 0 0 8 8 0.53
Due from 1 to 5 years 1,498 1,467 3.67 285 251 0.14
Due from 5 to 10 years 0 0 0 711 595 0.70
Total debt securities  1,498 1 1,467 3.67 1,004 2 854 0.54
1
Excluded accrued interest on debt securities held-to-maturity of CHF 18 million.
2
Excluded accrued interest on debt securities available-for-sale of CHF 4 million.
Allowance for credit losses on debt securities available-for-sale
As of the end of 6M23 and 2022, the Bank had no allowance for credit losses on debt securities available-for-sale.
> Refer to “Note 16 – Investment securities” in VIII – Consolidated financial statements – Credit Suisse (Bank) in the Credit Suisse Annual Report 2022 for further information.