The Federal Reserve increases the money supply by:

1. Lowering the federal funds rate: When the Federal Reserve lowers the federal funds rate, it becomes cheaper for banks to borrow money. This encourages banks to lend more to consumers and businesses, increasing the overall money supply in the economy.

2. Open market operations: The Federal Reserve can also increase the money supply by purchasing government securities on the open market. By buying these securities, the Fed injects money into the economy, leading to an increase in the money supply.

3. Lowering reserve requirements: Another way the Federal Reserve can increase the money supply is by lowering the reserve requirements that banks are required to hold. When banks are required to hold less in reserves, they have more money available to lend out to consumers and businesses, leading to an increase in the money supply.

4. Quantitative easing: In times of economic crisis, the Federal Reserve may implement a policy known as quantitative easing, in which it buys large quantities of government securities and other financial assets to inject money into the economy. This is done to stimulate economic growth and increase the money supply.

Overall, the Federal Reserve can increase the money supply through various monetary policy tools to help stimulate economic activity and promote growth in the economy.