Credit Suisse on Thursday said it would borrow up to $54 billion from the Swiss central bank to shore up its liquidity and investor confidence after a slump in its shares intensified fears about a global financial crisis.

The Swiss bank's announcement helped stem heavy selling in financial markets in Asian morning trade on Thursday, following torrid sessions in Europe and the United States overnight as investors fretted about a run on global bank deposits.

In its statement early Thursday, Credit Suisse said it would exercise its option to borrow from the Swiss National Bank up to 50 billion Swiss francs ($54 billion). That followed assurances from authorities in the private banking hub on Wednesday that Credit Suisse met "the capital and liquidity requirements imposed on systemically important banks" and that it could access central bank liquidity if needed.