It's a little different. They have trillions of asserts backed up mostly by debt and a small dose of equity. This is how most banks operated, and why they are

It's a little different. They have trillions of asserts backed up mostly by debt and a small dose of equity. This is how most banks operated, and why they are so volatile. (Lehman was 30 to 1 debt to equity. Most banks are somewhere between 10 and 30 to 1)