As an overview, when the fed pursues open market purchase of
bonds, is it an expansionary monetary policy. When the fed
purchases bonds from banks and financial institutions, the bonds
are exchanged for cash. This infuses liquidity in the banking
system and the federal fund rate is pushed lower. When the federal
fund rate declines, the cost of funding for the banks also declines
and banks pass the benefit to consumers by lowering interest
rates.
While lowering of interest rates can help boost economic growth
by stimulating leveraged investment and consumption spending, there
are several risks related to aggressive open market purchase of
bonds by the fed. Some of the key risks are as follows -
- In the fractional reserve banking system, it is credit growth
that creates money in the economic system. When credit growth is
robust at low interest rates, there is excessive money creation and
it results in inflationary pressure on the economy. Importantly, as
leveraged consumption and investment spending accelerates, the
economy moves into a inflationary gap. Therefore, risk of run away
inflation is high when the fed pursues aggressive open market
purchase.
- When the economy is already operating at potential GDP or moves
above potential GDP, there is less appetite in the economy for
investment spending or consumption spending. However, as interest
rates are low, money is borrowed and diverted to speculation across
asset classes. It is ultra expansionary monetary policy that
resulted in the housing bubble and the stock market bubble.
Therefore, another big risk relates to asset bubbles that can
trigger a financial crisis.