Swiss National Bank says it’s adding co-operative lender Raiffeisen to a list of banks that come under closer supervision due to their importance to the wider financial system

Credit Suisse, Union Bank of Switzerland and Zuercher Kantonalbank are the other three

Raiffeisen, cantonal banks such as Zuercher Kantonalbank and Banque Cantonale de Geneve , and other regional lenders provide the bulk of Swiss mortgage lending and this latest move highlights the SNB’s housing market concerns