Bonds due for repayment within the next twelve months are reported under current financial liabilities.

As at 31 December 2020 and 2019, no properties were pledged to secure available credit lines. Credit lines with Swiss banks (without securities) totalled CHF 382 million (31.12.2019: CHF 107 million), of which CHF 368 million was unused as at 31 December 2020 (31.12.2019: CHF 93 million).

In 2020, the CHF 100 million bond, maturing on 12 June 2020, with a coupon of 0.35%, was repaid on redemption date.

In 2019, a CHF 140 million bond maturing on 15 February 2021 was issued on 14 February 2019. The coupon is 0.773%. The proceeds were used to refinance the CHF 140 million bond that expired on 14 February 2019. Furthermore, a CHF 140 million bond maturing on 9 October 2023, with a coupon of 0.05%, was issued on 9 October 2019.

As at the balance sheet date, the following bonds are outstanding:

As at the balance sheet date, amounts falling due are as follows:

The interest maturity periods correspond to the above listed maturities. As at 31 December 2020 interest rates lie between 0.05% and 0.77% (31.12.2019: 0.05% and 0.77%). The average interest rate of the outstanding financial liabilities as per 31 December 2020 stands at 0.55% (31.12.2019: 0.52%).