BACK IN 2002, before he became chairman of the Federal Reserve, Ben Bernanke claimed that if short-term interest rates fell to zero, a central bank still had the ultimate weapon: printing money by purchasing government bonds. Having now actually tried quantitative easing himself, Mr Bernanke is discovering its limits.
In March the Fed announced plans to purchase $300 billion of Treasury debt by September with newly printed money (to be more precise, electronic money in the form of bank reserves) and to more than double planned purchases of mortgage-related debt to $1.45 trillion. The $300 billion in Treasury purchases, in particular, were widely assumed to be the start of a much more substantive plan. Yet the Fed’s latest policy meeting wrapped up on August 12th without any plans to expand either scheme, although it did move the completion date for Treasury purchases back to the end of October and kept the option of boosting purchases later. It left its short-term interest-rate target at zero to 0.25%. Such inaction contrasts with the Bank of England’s decision on August 6th to expand its programme of asset purchases, mainly of government bonds, from £125 billion ($206 billion) to £175 billion.
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...why is the Fed not expanding them? The outlook has improved, for one thing: America’s economy is levelling out, it noted on August 12th. But the main reason is political, not economic. The Fed’s Treasury-purchase plan prompted charges that it was inviting hyperinflation and had subordinated itself to the government’s deficit needs. Alan Greenspan, a former Fed chairman, says inflation will exceed 10% if the Fed fails to shrink its balance-sheet and raise rates, and 3% for a time even if it does.
Needless to say, that is not the Fed’s view: it still foresees rising unemployment and falling inflation. But many officials have concluded that, for now, the benefits of buying more Treasuries do not outweigh the costs of a damaging rise in inflation expectations and a perceived loss of independence. Even the ultimate weapon is useless if you are too nervous to use it.