The implosion of Silicon Valley's largest bank has investors worried worse is to come: 'There might be some kind of crack in the financial system'

• The implosion of the California lenders Silicon Valley Bank and Silvergate has investors worried.
• They're concerned a particular weakness in the banks is mirrored across the financial system.
• One investor called it the "first sign there might be some kind of crack in the financial system."

Silicon Valley is on a knife edge after the implosion of two banks at the heart of its financial system. But it's not only California's tech industry that should be concerned.