5 c) 2019 The change in the number of shares in 2019 was as follows: In shares Share capital Treasury shares Common shares outstanding At 01.01.2019 560,396,652 -771,125 559,625,527 Shares cancelled -3,771,125 3,771,125 Options and free shares exercised 1,491,678 1,491,678 Treasury shares purchased -3,000,000 -3,000,000 AT 31.12.2019 558,117,205 - 558,117,205 The change in treasury shares in 2019 was as follows: In shares Buyback programme Allocated to free-share plans Total € mill ions At 01.01.2019 - 771,125 771,125 56.5 Shares cancelled -3,000,000 -771,125 -3,771,125 -56.5 Options and free shares exercised - - - Treasury shares purchased 3,000,000 3,000,000 - AT 31.12.2019 - - - - €  millions - - - - 11.3. Other comprehensive income The following tables indicate movements in this item: €  millions 31.12.2021 31.12.2020 31.12.2019 Securities at fair value through other comprehensive income Reserve at beginning of period 5,293.2 6,562.3 4,911.7 Changes in fair value over period 1,192.2 -1,269.1 1,650.6 RESERVE AT END OF PERIOD 6,485.4 5,293.2 6,562.3 € millions 31.12.2021 31.12.2020 31.12.2019 Cash flow hedges – foreign exchange Reserve at beginning of period 173.8 44.8 41.7 Changes in fair value over period -75.2 78.7 201.8 Changes in fair value recorded through other comprehensive income -128.4 50.3 -198.7 Deconsolidation - - - RESERVE AT END OF PERIOD -29.8 173.8 44.8 The table below shows the impact of an increase or decrease of over 10% in the euro and US dollar against other currencies on the foreign exchange cash flow hedging reserve and the market value of the hedging instruments: € millions 31.12.2021 31.12.2020 31.12.2019 Impact of a 10% increase in the EUR against all other Group currencies 359.9 344.5 323.1 Impact of a 10% decrease in the EUR against all other Group currencies -344.9 -324.2 -301.9 Impact of a 10% increase in the USD against key Group currencies -80.4 -43.7 -27.0 Impact of a 10% decrease in the USD against key Group currencies 90.7 54.9 41.2 € millions 31.12.2021 31.12.2020 31.12.2019 Cash flow hedges - interest rates Reserve at beginnning of period - - - Changes in fair value over period - - - Impairment loss recorded through other comprehensive income - - - RESERVE AT END OF PERIOD - - - € millions 31.12.2021 31.12.2020 31.12.2019 Actuarial gains/(losses) and impact of asset ceiling Reserve at beginning of period -1,283.7 -1,058.2 -730.5 Actuarial gains/(losses) over the period 584.1 -224.4 -327.7 Impact of asset ceiling 1.1 -1.1 - Deconsolidation and other 0.2 - - RESERVE AT END OF PERIOD -698.3 -1,283.7 -1,058.2 L ’ ORÉAL I UNIVERS AL REGISTRATION DOCUMENT 2021 331 2021 CONSOLIDATED FINANCIAL STATEMENTS Notes to the consolidated financial statements