- Credit Suisse's shares fell more than a fifth after largest investor, Saudi National Bank, said it could not give it more money.
- Credit Suisse has been weakened by a series of scandals and the failure of two U.S. banks.
- Investors worried Credit Suisse's problems could ripple through global markets.
- Regulators watched the stock fall with concern while rivals and clients scanned their books to see what exposure they had to the bank.
- Swiss regulators threw Credit Suisse a financial lifeline to calm markets.
On the precipice: How Credit Suisse's day of drama unfolded
On March 16, 2008, Bear Stearns was forced into the arms of JPMorgan Chase & Co in a dramatic weekend rescue after Wall Street turned on the investment bank, fearing it would collapse.
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