8. Depreciation, amortization and impairment

As of 31 December 2019, in addition to the regular depreciation on property, plant and equipment, there is a reversed impairment of CHF 5.0 million of financial assets against group companies (previous year: CHF 3.6 million). A revaluation of investments in the amount of CHF 0.5 million was also made due to the intention to sell.