Switzerland’s biggest bank, UBS, has agreed to buy its ailing rival Credit Suisse in an emergency rescue deal aimed at stemming financial market panic unleashed by the failure of two American banks earlier this month.

“UBS today announced the takeover of Credit Suisse,” the Swiss National Bank said in a statement Sunday. It said the rescue would “secure financial stability and protect the Swiss economy.”

UBS is paying 3 billion Swiss francs ($3.25 billion) for Credit Suisse, about 60% less than the bank was worth when markets closed on Friday. Credit Suisse shareholders will be largely wiped out, receiving the equivalent of just 0.76 Swiss francs in UBS shares for stock that was worth 1.86 Swiss francs on Friday. Owners of $17 billion worth of “additional tier one” bonds — a riskier class of bank debt — will lose everything, Swiss regulators said.

Extraordinarily, the deal will not need the approval of shareholders after the Swiss government agreed to change the law to remove any uncertainty about the deal.

Credit Suisse (CS) had been losing the trust of investors and customers for years. In 2022, it recorded its worst loss since the global financial crisis. But confidence collapsed last week after it acknowledged “material weakness” in its bookkeeping and as the demise of Silicon Valley Bank and Signature Bank spread fear about weaker institutions at a time when soaring interest rates have undermined the value of some financial assets.