Definition
A situation where lowering interest rates near zero fails to stimulate borrowing or spending. Even with plenty of cash in the economy, money sits idle in bank accounts and vaults, rendering interest rate cuts ineffective.
You can pull a string, but you can't push it
Imagine tying a piece of string to a toy car on a desk and holding the other end. If you gently pull the string, the toy car rolls right toward you. But what happens if you try to push the string forward? The toy stays put, and the string just bunches up limply.
Interest rates managed by a central bank work a lot like this string. When the economy overheats, the central bank raises rates so people borrow less. This is like pulling the string—the force transmits very well.
Conversely, when the economy freezes, they cut interest rates. This makes borrowing cheaper to encourage spending. But this is like pushing a string—the push rarely travels through.
Just as pushing a loose string won't budge the toy, dropping interest rates to rock bottom sometimes fails to open people's wallets. Economists call this state a liquidity trap.
Why money won't circulate even when it is everywhere
Let's look back at the limp string. The issue is not a lack of pushing power; it's that a slack string simply cannot transmit force. People's mindset acts just like that loose string.
If people expect prices to drop further, they postpone purchases planned for today. When jobs feel insecure, low interest rates won't convince anyone to take on debt. So cheaper borrowing never translates into spending.
Banks lending the money face a similar dilemma. Fearing borrowers won't pay them back, banks pull back on loans and park their cash in safe havens. In the end, there is plenty of money out there, but it sits idle instead of circulating.
Even if central banks want to cut rates further, rates are already near zero with no room left to go down. It's like having no more string left to play with.
A closer look
Let's return to the string analogy one last time. Just because a string cannot push forward does not mean the string is gone. It simply isn't taut enough to carry the push.
A liquidity trap does not mean money has disappeared either. Money stays right in bank accounts and vaults, but loses its power because it isn't being spent. Holding plenty of string is useless if it won't stay taut.
That is why policymakers turn to other tools instead of interest rates. Central banks might buy bonds directly to inject money, or governments might boost public spending to create jobs. Instead of pushing the string, they pull the economy from the other end.
Of course, rate cuts aren't always useless. In a healthy economy, the string is taut, so lowering rates quickly boosts spending and borrowing. Also, knowing whether an economy is truly trapped is often something economists can confirm only in hindsight.
Common misconceptions
A liquidity trap happens because there is a shortage of money in the economy.
Money is often abundant. The real problem is that people and banks hoard it instead of spending or lending it.
Cutting interest rates even further will eventually fix the problem.
When rates are already near zero, there is virtually no room left to cut. Plus, if people expect prices to keep falling, rate cuts alone won't persuade them to spend.
Where you meet it
Households stockpiling money in savings accounts without borrowing or spending, even though interest rates are near zero.
Consumers delaying purchases of cars or appliances because they expect prices to drop even lower in the coming months.
In one sentence
A state where cutting interest rates to zero fails to get people to spend or borrow, leaving money pooling idle in the economy.