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The Swiss Central Bank is moving to shore up globally-influential bank, Credit Suisse, whose shares have fallen as much as a quarter to a new record low.
Its largest investor, the Saudi National Bank, is refusing to offer further bail-outs.
Trading of Credit Suisse shares on the Swiss market have been paused, sending shares of other European banks into a downward spiral.
Global stock markets fell overnight and gains on Wall Street have reversed.
This follows the collapse of Silicon Valley and Signature Banks in the United States this week. Kathryn speaks with BBC correspondent in Bern, Imogen Foulkes.
