https://en.wikipedia.org/wiki/Open_market_operation#United_States https://en.wikipedia.org/wiki/Open_market_operation#United_S... They are mainly trying to con

https://en.wikipedia.org/wiki/Open_market_operation#United_States https://en.wikipedia.org/wiki/Open_market_operation#United_S... They are mainly trying to control the size of bank reserves by buying and selling securities, with the goal of hitting a target interest rate. When they are worried about inflation, they increase interest rates.