The “unorthodox” Quantitative Easing (QE) monetary measures, along with another “unorthodox” monetary policy, namely negative interest rates, have been implemented by a number of countries in the years following the global financial crisis. This is as a result of the normal policy monetary instrument, the rate of interest, being reduced to nearly zero by a number of central banks. We discuss these measures but most importantly we discuss the extent to which they have been successful in terms of their targets.
QE includes two types of measures: (i) one is “conventional unconventional” measures, whereby central banks purchase financial assets, such as government securities or gilts, which boost the money supply; (ii) another is “unconventional unconventional” measures; in this way central banks buy high-quality, but illiquid corporate bonds and commercial paper. The purpose under both measures is not merely to increase the money supply but also, and more importantly, to increase liquidity and enhance trading activity in these markets.
A number of QE possible channels can be identified. There is the liquidity channel, whereby the extra cash can be used to fund new issues of equity and credit; thereby bank lending is influenced positively, which potentially can affect spending. The purchase of high-quality private sector assets, which aims at improving the liquidity in, and increase the flow of, corporate credit. There is also the portfolio channel, which changes the composition of portfolios, thereby affecting the prices and yields of assets (and thus asset holders’ wealth); the cost of borrowing for households and firms is also affected, which influences consumption (also affected by the change in wealth) and investment. Additionally, there is the expectations-management channel: asset purchases imply that, although the Bank Rate is near zero, the central bank is prepared to do whatever is needed to keep inflation at the set target; in doing so the central bank keeps expectations of future inflation anchored to the target.
The success of QE depends on four aspects: (i) what the sellers of the assets do with the money they receive in exchange from the central banks; (ii) the response of banks to the additional liquidity they receive when selling assets to the central banks; (iii) the response of capital markets to purchases of corporate debt; and (iv) the wider response of households and companies, especially so in terms of influencing inflation expectations.