A regulatory backlash is under way as the US body politic comes to grips with the financial crisis. Wall Street – or what is left of it – is first in the line of fire. But the era of excess was as much about policy blunders and regulatory negligence as about mistakes by financial institutions. As Washington creates a new system, it must also redefine the role of the Federal Reserve.

Specifically, the US Congress needs to alter the Fed’s policy mandate to include an explicit reference to financial stability. The addition of those two words would force the Fed not only to aim at tempering the damage from asset bubbles but also to use its regulatory authority to promote sounder risk management practices. Such reforms are critical for a post-bubble, crisis-torn US economy.