(26)Given that a significant number of shares that are issued and admitted to trading in Switzerland are also traded on trading venues in the Union, it is appropriate to ensure that all investment firms subject to the trading obligation as set out in Article 23(1) of Regulation (EU) No 600/2014 preserve the ability to undertake trades in shares admitted to trading on the Swiss exchanges where their primary liquidity resides. As the primary liquidity of shares admitted to trading on the Swiss exchanges resides in these exchanges, the recognition of the legal and supervisory framework of Switzerland would allow investment firms to trade shares admitted to trading in Switzerland on Swiss exchanges and to fulfil their best execution obligation towards their clients.