Should the U.S. Federal Reserve use quantitative easing to prevent market crashes?

Context

Quantitative easing (QE) is an unconventional monetary policy tool where central banks like the Federal Reserve purchase long-term securities to inject money into the economy when interest rates are already near zero and traditional stimulus has exhausted itself. Policymakers debate whether QE effectively prevents market crashes and stimulates growth, or whether it inflates asset bubbles and creates long-term economic distortions. The question has become urgent under new Fed Chair Kevin Warsh, who has signaled a shift toward quantitative tightening rather than easing, raising questions about the Fed's future crisis-response toolkit.