UBS and Credit Suisse's merger will create the biggest bank in Switzerland, raising concerns about its size. Both banks are considered too big to fail and are of strategic importance to the global banking system.
Some in business, industry, and politics are sceptical about the merger and the impact on services offered to companies, costs, and competition.
The merger prevented the collapse of Credit Suisse and triggered criticism among Swiss political circles, with calls for further regulation and partial nationalization.