A liquidity trap refers to a highly adverse economic scenario that usually occurs when interest rates are extremely low. Low interest rates can result in people neither spending nor investing the cash they have. Instead, they hoard their cash, which can significantly impact economic growth.
When people do not spend or invest, businesses struggle to sell their products or services, which can badly affect economic growth. The term “liquidity trap” was first used by renowned economist John Keynes.
In a liquidity trap, people prefer to keep their cash idle and do not invest it in bonds or other instruments. Hence, Keynes said that a liquidity trap can make monetary policymakers feel powerless because they cannot increase economic growth by reducing interest rates. Having learnt the liquidity trap’s definition, let us delve deeper into this topic.
Understanding a Liquidity Trap
A liquidity trap typically happens when people are anxious about adverse events, which can be a war or deflation. As they are anxious, they prefer not to spend and hoard cash. In such a situation, interest rates tend to be extremely low and consumer savings tend to be very high.
Consumer savings are high, as consumers refuse to spend much, preferring instead to hoard the cash they have. During normal times, if the central bank thinks that economic growth is low, it can reduce interest rates, thereby providing people with a stimulus to borrow and spend more.
However, in times of a liquidity trap, people are afraid of an adverse event. Hence, they prefer not to spend much. Consequently, even if the central bank lowers the interest rates, it fails to act as a stimulus. As a result, the central bank may feel powerless.
It is called a “trap” because no matter what monetary policymakers do, they find it extremely difficult to stimulate an economy.
What Leads to a Liquidity Trap?
A variety of factors lead to a liquidity trap. The most important of them is extremely low interest rates, which can even approach zero. When interest rates are so low, it makes a central bank wonder whether reducing them any further will result in an increase in demand or not.
The other factor that leads to a liquidity trap is deflationary expectations, wherein people start expecting prices to fall. As they expect prices to decline anytime soon, they postpone their purchases, which becomes a vicious circle, resulting in low aggregate demand.
Often, a liquidity trap occurs when businesses and individuals hold a pessimistic view of the economy. As a result, consumption falls and businesses do not invest in expansion. Such a pessimistic view can be caused by reasons like war, etc.
Graphical Representation of the Liquidity Trap
To understand the graphical representation of the liquidity trap, we need to understand the “IS” and “LM” curves in the Keynesian macroeconomic model. The IS curve means the “Investment-Savings Curve.” It shows the relationship between income (Y) and the prevailing interest rate (i) in the goods market. It is a downward-sloping curve. This is because as the interest rate falls, the investment in an economy increases, thereby increasing the income or output. When the interest rate falls, it becomes easier for businesses to borrow and invest, which increases their output/income, and vice versa.
The LM curve stands for the "Liquidity Preference-Money Supply Curve." It demonstrates the relationship between the interest rate (i) and income (Y) in the money market. This is an upward-sloping curve. This is because as income increases, the demand for money increases. When people have more income, they need more money for their transactions. Hence, the interest rate should increase to motivate people to hold the money they have.
Where both these curves (IS and LM) intersect shows the equilibrium in both the money market and the goods market. This point shows the equilibrium income and interest rate in an economy.
As we know, the liquidity trap occurs when the interest rate is really low. Consider the graph below and notice the flat part of the LM curve. At this point, the interest rate will not change if the money supply increases. Hence, any change in the interest rate will not impact income (Y), either.
When an economy is in the grip of the liquidity trap, its investment or consumption does not improve by changing the interest rate.