What quantitative easing did not do

When the Federal Reserve brought its major quantitative-easing purchases to a close in 2014, the natural question was whether the policy had worked. A definitive answer was difficult because no comparable version of the economy existed without QE. The evidence did, however, show several outcomes the programme did not produce.

These distinctions matter. At the programme's outset, some accounts predicted a mechanical surge in broad money and nominal output, rapid inflation, or a monetary expansion strong enough to offset fiscal tightening. The charts available at the time did not support those simple expectations.

1. QE did not follow the textbook multiplier

Federal Reserve asset purchases expanded the monetary base: currency plus reserves held within the banking system. Older textbook descriptions sometimes called this “high-powered money” because a stable money multiplier would connect an increase in the base to a proportional increase in broader money.

A second ratio, money velocity, relates the broad money stock to nominal gross domestic product. If both the multiplier and velocity remained constant, increasing the base would predictably raise nominal GDP. The remaining question would then be how much appeared as real output and how much as inflation.

Those ratios had shown periods of relative stability before the financial crisis, but stability in one era was not a rule of nature. Once short-term rates approached zero and QE began, the relationships changed sharply.

Chart 1 · Monetary base, broad money and nominal GDP

Conceptual reconstruction of the indexed comparison used in the 2014 analysis; first quarter of 2008 = 100.

Before the second half of 2008, the series moved more closely together. After the Federal Reserve began its first major asset-purchase programme, the base increased rapidly while broader money moved much less. That divergence represented a steep fall in the multiplier. Nominal GDP initially declined and later recovered more slowly than the money stock, indicating lower velocity.

2. QE did not produce rapid inflation

The weak mechanical link between the base and nominal GDP had two sides. Warnings that the enlarged central-bank balance sheet would quickly produce extreme inflation were not borne out. At the same time, inflation did not remain reliably at the Federal Reserve's two-percent objective during the period examined.

The 2014 evidence instead showed a slow recovery in output and employment. Unemployment had fallen substantially from its post-crisis peak but had not yet reached the range then associated with full employment. The personal consumption expenditures price index, the Federal Reserve's preferred inflation measure, had also slowed after an earlier rise.

Chart 2 · Inflation and labour-market recovery

Historical relationship considered at the programme's conclusion in 2014.

The Federal Reserve judged the progress sufficient to stop adding to its asset holdings under the programme, but the historical record did not show either the predicted inflation surge or an exceptionally rapid return to full employment.

3. QE did not fully overcome fiscal restraint

The years after the crisis also created an unusual policy comparison. Monetary policy remained expansionary while fiscal policy shifted toward restraint. Neither force entirely displaced the other: fiscal tightening did not stop the recovery, yet QE did not generate a decisive acceleration against it.

The structural primary balance was a useful way to examine the fiscal stance. It estimated government revenue and non-interest expenditure after filtering out the automatic effects of the business cycle. A movement toward a larger structural deficit indicated added support; movement toward surplus indicated tightening.

Chart 3 · The structural primary balance

A historical gauge of underlying fiscal policy after cyclical effects and debt-interest costs are excluded.

During the deepest part of the recession, fiscal measures and QE moved broadly in the same direction. Around the time recovery began, the fiscal stance changed and continued tightening through the period covered by the article. Federal Reserve leadership had already emphasised that monetary policy alone could not achieve everything available from a broader and more balanced policy mix.

The bottom line

Looking at what QE did not do helps explain why its overall effect remains difficult to isolate. It was not a controlled experiment, and policy operated alongside changing credit demand, financial repair, household behaviour and fiscal restraint.

The proposition that conditions would have been worse without QE remained plausible, but it was necessarily counterfactual. The three charts offered a narrower and more defensible conclusion: reserve creation did not mechanically multiply into spending, it did not cause the rapid inflation some expected, and it was not strong enough to erase the effects of a tightening fiscal stance.