3 Own shares included in current assets (excluding trading positions) audited information (XLS:) Download Quantity Book value Quantity / in CHF thousands 31.12.2017 31.12.2016 31.12.2017 31.12.2016 Start of year 1'959'238 1'974'622 78'987 70'790 Bought 0 0 0 0 Sold −36'301 −15'384 −3'159 −1'339 Additions / (Impairments) 0 0 19'066 9'535 End of year 1'922'937 1'959'238 94'894 78'987