Liquidity Trap

A liquidity trap is a condition in which interest rates are so low, at or near 0 percent, that conventional monetary policy loses traction, because households and institutions prefer holding cash to lending or spending no matter how much money the central bank adds. The concept comes from John Maynard Keynes and was revived to describe Japan after its asset bubble burst in 1990.

Why it matters

Liquidity traps are why the world's major central banks went unconventional. When the US Federal Reserve held its policy rate at 0 to 0.25 percent from 2008 to 2015 and demand still lagged, it turned to quantitative easing and forward guidance. Japan went further still, spending most of three decades experimenting with zero rates, negative rates, and yield curve control.

The episode reshaped monetary economics. Once the floor of zero is reached, policy shifts from setting a price for money to expanding its quantity, with side effects on asset prices, inequality, and government financing that economists still argue over.

In the gold vs bitcoin debate

Zero-rate environments are friendly to assets that pay no yield, because the opportunity cost of holding them disappears. Gold's strong decade after 2008 and bitcoin's rise through the low-rate 2010s both drew strength from that arithmetic, and advocates of each point to liquidity-trap policymaking as evidence that fiat systems drift toward permanent monetary experimentation.