The package came less than a day after Swiss bank Credit Suisse (CSGN.S) clinched an emergency central bank loan of up to $54 billion to shore up its liquidity. Analysts say authorities appear eager to quickly deal with systemic risks, but worry the potential for a banking crisis is far from over. "Yellen was clear overnight that all bank deposits were protected, but the bank might not be there," he said. Within days, the market turmoil had ensnared Credit Suisse, forcing it to borrow from Switzerland's central bank. Credit Suisse shares closed 19% higher on Thursday, recovering some of their 25% fall on Wednesday.

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