Last week the shares of Credit Suisse fell to an all-time low, causing the Swiss National Bank to step in with a liquidity lifeline of up to 50 billion Swiss francs ($54 billion). This marked the first major bank intervention since the 2008 global financial crisis. The bank’s shares have nosedived nearly 98% since their peak in April 2007, while credit default swaps, insuring bondholders against defaults, reached record highs.