Why do market operations have importance in monetary policy tool since the financial crisis? ​

The use of open market operations as a monetary policy tool ultimately helps the Fed pursue its dual mandate—maximizing employment, promoting stable prices—by influencing the supply of reserves in the banking system, which leads to interest rate changes.Aug 21, 2019

The use of open market operations as a monetary policy tool ultimately helps the Fed pursue its dual mandate—maximizing employment, promoting stable prices—by influencing the supply of reserves in the banking system, which leads to interest rate changes.

Explanation:

july 1861 here you go hope it

during world war ii