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What is a liquidity crunch?

In one line: A liquidity crunch is a sudden shortage of cash and credit, when lenders pull back and buyers vanish, so selling or borrowing becomes hard.

Trading glossary · Updated 2026-10-21

A simple example

In normal times, if you want to sell, there's a buyer close to the last price. That's Liquidity.

In a crunch, buyers step back all at once. Here's an illustration of a bond on a calm day vs a crunch day:

The spread is 20 times wider. Selling now means taking a much worse price.

How it happens

Everyone wants cash at the same moment. Lenders worry about getting paid back, so they stop lending. Firms that need cash sell what they can, which pushes prices down, which makes lenders more nervous.

Real examples:

• 2008: after Lehman Brothers failed, banks stopped trusting each other and short-term lending froze.
• March 2020: as COVID hit, even the US Treasury market, usually the deepest in the world, was strained. The Fed stepped in on a huge scale.

A Central bank often acts as "lender of last resort" to calm a crunch.

Why it matters for traders

In a crunch, the market you trade can change in minutes:

• Spread widening makes every trade cost more.
• Slippage grows, so a stop can fill far from its price.
• Prices that usually move separately can all fall together, as everyone sells what they can.

That's one reason to size every trade from the stop, with room for a bad fill. The position size calculator helps.

A common mistake

Thinking a stop loss guarantees your exit price. A regular stop becomes a market order when hit. In a crunch, the next available price may be far away. Smaller size is the real protection.

Questions