In addition, such policies can build resilience in the financial system, enhancing its ability to absorb and shrug off unexpected losses from any source, including sharp asset price declines. Of course, monetary policy also has the power to lean against the growth of asset bubbles.
While there could be situations in which monetary policy might be needed to try to limit the growth of a bubble, in my opinion such use would represent a failure of regulatory policy, which represents a more tailored response than the flattening out of aggregate demand that would likely result from contractionary monetary policy.