Update (1215ET): Credit Suisse just can't catch a break as, on top of all the systemic fragility and financial instability, Bloomberg reports the US Justice Department is investigating whether CS continued to help US clients hide assets from authorities, eight years after the bank paid a $2.6 billion tax-evasion settlement and pledged to tackle the issue.

The Justice Department has examined allegations raised by whistleblowers who said Credit Suisse bankers "continued to assist additional Americans with concealing assets from the United States after 2014," according to a court filing last November.

"Despite recent tough talk from DOJ about holding repeat corporate offenders accountable, nothing has happened to Credit Suisse," said Jeffrey Neiman, an attorney for the whistleblowers.

"They have gotten away with lying to the United States at the expense of the American taxpayer."