Key Highlights
- Former Fed chairs Yellen, Bernanke, and Greenspan signed a statement against the investigation of Jerome Powell.
- They argue the investigation undermines the Federal Reserve's independence.
- The statement warns that similar actions in other countries have led to negative economic impacts.
- Thirteen former officials participated in the condemnation of the investigation.
- The investigation has been described as an 'unprecedented' assault on the Fed's independence.


