Financial crisis caused by overconfidence and complexity in shadow banking system.
The financial crisis in 2007 showed that the system had some big problems. One issue was with complicated financial products from the shadow banking system. These products grew a lot before the crisis. The crisis happened because investors were too confident and busy, and they were using other people's money. The crisis was made worse by a long time before it happened, a shift to the shadow banking system, more connections between financial firms, and more borrowing by some firms.