It is among the 30 global players in the banking sector considered too big to fail: the private Swiss bank Credit Suisse has problems with its liquidity.

They are saving it for now with a loan for 50 billion francs.

Credit Suisse has been plunged into a crisis of confidence after its shares collapsed on the Swiss stock exchange.

On Wednesday, the bank's shares fell as much as 30 percent in late trading.

To solve its liquidity problem, the bank decided to borrow up to 50 billion Swiss francs (54 billion US dollars) from the Swiss National Bank. 

The loan is fully secured by first class assets.

In addition, the bank announced a series of debt buybacks for around 3 billion Swiss francs.

"These are decisive measures to strengthen Credit Suisse," said its CEO Ulrich Koerner.

The crisis, which experts hope is only temporary, began after it became known that the largest shareholder in the financial institution, namely the Saudi National Bank, refused to pour more money into Credit Suisse.

The reason lies in some regulatory restrictions, Riyadh said.

Credit Suisse posted losses of 7.3 billion francs last year, and depositors withdrew assets worth another 123 billion francs.

Credit Suisse requested support from the Swiss central bank

The crisis caused turmoil in the financial markets

Credit Suisse thus becomes the first globally significant bank since the financial crisis to be bailed out with emergency loans.

The dramatic drop in its share price caused concern around the world and led to turmoil in financial markets.

At the same time, however, there are no signs that the crisis in the private bank could spread to other Swiss credit institutions, including the problems of the American Silicon Valley Bank.

Credit Suisse tried to reassure their customers.

It is a "very well capitalized bank", stressed the head of Credit Suisse Switzerland, Andre Helfenstein, in an interview with the Swiss television Blick TV.

Credit Suisse will take out a 50 billion franc loan from the Swiss central bank

With the problems of the private Swiss bank, which is among the world's 30 largest banks considered too big to fail, financial institutions, regulators and governments around the world are trying to assess the risks.

Individual governments even asked Switzerland to intervene.

Lindner: "The German credit system is stable"

In Germany, Finance Minister Christian Lindner assured that the German credit system is stable.

"The federal government is in constant and intensive exchange of views with all interested parties," he emphasized to the public television ARD.