Assessing quantitative easing Muzzled Aug 13th 2009 | WASHINGTON, DC From The Economist print edition Politics stops the Fed from expanding an asset-purchase scheme 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 Fedâs 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 Englandâs decision on August 6th to expand its programme of asset purchases, mainly of government bonds, from Â£125 billion ($206 billion) to Â£175 billion. Comparisons are inexact. The Fed has been intervening more aggressively than the bank in other ways. The programmes also have different rationales. The Fed emphasises the ability of bond purchases to lower yields and improve liquidity in private debt markets. The Bank of England says its programme aims to boost spending by putting more money into the economy. Analysing the programmesâ precise impacts is also tricky. Government-bond yields in both Britain and America initially fell sharply on the announcement of the asset-purchase programmes, which are substantial relative to GDP (see chart). Yields have since retraced that drop in Britain and bounced higher than before in America. But lots of factors are at play. Expected inflation (as implied by the gap between conventional and inflation-indexed bond yields) has risen. The fear of global meltdown that drove investors to the safety of governments bonds has ebbed. Nevertheless, an IMF study estimates that Britainâs longer-term yields are 40-100 basis points lower than they would have been without the bankâs purchases. The impact on private yields is also probably positive. Macroeconomic Advisers, a consultancy, estimates that American mortgage rates are a percentage point lower relative to Treasuries as a result of the Fedâs asset purchases. The Bank of England takes some credit for a narrowing in corporate-bond spreads. The European Central Bank says the announcement of plans to buy â¬60 billion ($85 billion) of covered bonds has helped revive new issuance and bring down spreads. If the programmes are doing some good, why is the Fed not expanding them? The outlook has improved, for one thing: Americaâs economy is levelling out, it noted on August 12th. But the main reason is political, not economic. The Fedâs Treasury-purchase plan prompted charges that it was inviting hyperinflation and had subordinated itself to the governmentâs 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 Fedâs 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.