Their credit default swaps, which reflect the chance of a company defaulting on their debt, have skyrocketed over the weekend.
CEO Ulrich Koerne sent a memo to staff late last week assuring them of the financial stability and capital reserves of the bank, though this has backfired and caused many to question the reasons for the memo.
While some are calling this a potential Lehman Brothers moment, so far Credit Suisse looks to be safe from that type of shock collapse.
After all the talk about the crashing British pound last week, it seems that the trouble in Europe doesn't end there. This week there's been a growing murmur of problems within one of the worlds largest investment banks, Credit Suisse.