HSBC, Barclays, Deutsche Bank and Goldman Sachs reported to be among 10 banks facing probe.
HSBC has wiped away muck from its past of aiding tax evasion, but it still helps rich tax dodgers.
Helping clients evade tax can't be the legal foundation of any Swiss case against the British bank.
British consumers increasingly disenchanted with tax avoiding businesses.
The probe is being led by Attorney General Olivier Jornot and prosecutor Yves Bertossa.
The FCA is working with other regulators to ensure that HSBC complies with the code of conduct.
Could activities at the bank be classed as predicate offences to money laundering?
HSBC chief executive Stewart Gulliver describes coverage of scandal as a 'painful experience'.
Ex-HSBC chairman Lord Green quits banking industry role as row over HSBC's Swiss tax avoidance scheme heats up
Abbey Forwarding director Rick Hone sectioned after suicide attempt when HMRC closed down firm.
The Labour Party has outlined plans to extend the current clawback period from seven to 10 years.
HMRC's chief executive Lin Homer faces questions about HSBC tax evasion before the Public Accounts Committee.
The pro or anti-business debate rumbles on, with HSBC's dodgy tax antics muddying the waters.
The Public Accounts Committee will also question Lord Green.
As HSBC faces the same exposure as UBS and Credit Suisse, a vaguely familiar story of big-ticket tax avoiders emerges.
Conservative lord and HSBC boss Stephen Green won't comment on past HSBC scandals.
The FPB has called on the next government to prioritise better ethics in business.
Media reports earlier revealed that HSBC's Swiss private bank helped wealthy clients across globe dodge income taxes.
HSBC warns that the future health of the global economy still hangs in the balance.
Franklin Mutual has a 7% stake in Canary Wharf Group, which is majority owned by Songbird Estates.
BREAKING: Trader was arrested following a dawn raid on his home in Essex.
The test involves resilience to a 35% fall in house prices and a 30% drop in the value of the pound.