Credit Suisse: What exactly is going on?

Shares of the bank plunged to an all-time low after its top investor ruled out further assistance, leading to the government, central bank and financial regulators stepping in to stabilise the bank.

Here's a round-up of the crisis:

1. Credit Suisse shares jump 30% after securing US$54 billion lifeline

2. Credit Suisse to borrow up to 50 billion francs from central bank

3. Troubles erupt into full-blown crisis as banks seek protection

4. Credit Suisse sheds 30% after key backer says no more cash injections