Financial crisis of 2007%E2%80%9308:

In a June 2008 speech, President and CEO of the New York Federal Reserve Bank Timothy Geithnerwho in 2009 became Secretary of the United States Treasuryplaced significant blame for the freezing of credit markets on a "run" on the entities in the "parallel" banking system, also called the shadow banking system. These entities became critical to the credit markets underpinning the financial system, but were not subject to the same regulatory controls. Further, these entities were vulnerable because of maturity mismatch, meaning that they borrowed short-term in liquid markets to purchase long-term, illiquid and risky assets. This meant that disruptions in credit markets would make them subject to rapid deleveraging, selling their long-term assets at depressed prices. He described the significance of these entities:

Please answer a question about this article. If the question is unanswerable, say "unanswerable". What is the "parallel" banking system also called?
shadow banking system