During the financial crisis of 2007-2009, why did the Federal Reserve begin to utilize various types of unconventional monetary policy?

Question

Quizplus · Accepted Answer

The Federal Reserve began to utilize various types of unconventional monetary policy during the financial crisis of 2007-2009 because the federal funds rate had already been reduced to zero, leaving them with limited traditional monetary policy options. In order to stimulate the economy and prevent a collapse, they had to resort to unconventional methods such as quantitative easing and forward guidance.

During the Financial Crisis of 2007-2009, Why Did the Federal