And so the Fed, under Ben Bernanke's leadership, turned to the liquidity injections of quantitative easing, making it even more of a creature of financial markets. With the interest-rate transmission mechanism of monetary policy no longer operative at the zero bound, asset markets became more essential than ever in supporting the economy. Exceptionally low inflation was the icing on the cake - providing the inflation-targeting Fed with plenty of leeway to experiment with unconventional policies while avoiding adverse interest-rate consequences in the inflation-sensitive bond market.

Today's Fed inherits the deeply entrenched moral hazard of the Asset Economy. In carefully crafted, highly conditional language, it is signaling much greater gradualism relative to its normalization strategy of a decade ago. The debate in the markets is whether there will be two or three rate hikes of 25 basis points per year - suggesting that it could take as long as four years to return the federal funds rate to a 3 percent norm.

But, as the experience of 2004-2007 revealed, the excess liquidity spawned by gradual normalization leaves financial markets predisposed to excesses and accidents. With prospects for a much longer normalization, those risks are all the more worrisome. Early warning signs of troubles in high-yield markets, emerging-market debt, and eurozone interest-rate derivatives markets are particularly worrisome in this regard.

The longer the Fed remains trapped in this mindset, the tougher its dilemma becomes - and the greater the systemic risks in financial markets and the asset-dependent US economy. It will take a fiercely independent central bank to wean the real economy from the markets. A Fed caught up in the political economy of the growth debate is incapable of performing that function.

Only by shortening the normalization timeline can the Fed hope to reduce the build-up of systemic risks. The sooner the Fed takes on the markets, the less likely the markets will be to take on the economy. Yes, a steeper normalization path would produce an outcry. But that would be far preferable to another devastating crisis.

The author is a faculty member at Yale University and former Chairman of Morgan Stanley Asia

Project Syndicate