by Steve Saville, The Speculative Investor
If you are asking the above question then your understanding of economics is sadly lacking or you are trying to mislead.
The Fed will never be completely out of monetary ammunition, because there is no limit to how much new money the central bank can create. The Fed will therefore always be capable of implementing some form of what Keynesians call stimulus. However, the so-called stimulus cannot possibly help the economy.
To believe that the central-bank monetisation of assets can help the economy you have to believe that an economy can benefit from counterfeiting. And to believe that the economy can be helped by lowering interest rates to below where they would otherwise be you have to believe that fake prices can be economically beneficial. In other words, you have to believe the impossible.
The reality is that the Fed never fights recession or helps the economy recover from recession, but it does cause recessions and gets in the way of genuine recovery after a recession occurs. For example, the monetary stimulus put in place by the Fed in response to the 2001 recession caused mal-investments — primarily associated with real estate — that were the seeds of the 2007-2009 recession.