SNB wants big banks to hold more capital

The Swiss National Bank has urged the country's regulator to impose more stringent capital requirements on UBS and Credit Suisse, the two biggest banks in Switzerland.

The central bank said in its Financial Stability Review, out Thursday, that it wants the Swiss Federal Banking Commission, the country's regulator, to tighten the risk-weighted capital requirements for the country's biggest banks.

The central bank also called on the regulator to introduce a floor for the capital-to-assets ratio