What does Liquidity mean?
Liquidity describes how readily buyers and sellers can transact without causing unusually large price changes. Highly liquid futures contracts generally have more active order flow and tighter bid-ask spreads than less liquid markets.
Why it matters
- Liquidity influences execution quality and slippage.
- Thin conditions can cause price to move more sharply when orders are submitted.
- Liquidity often changes by time of day, contract and market event.
How it works
- 01
Buy and sell orders are available at different prices in the order book.
- 02
A market order consumes available liquidity at one or more price levels.
- 03
When available size is limited, a larger order may receive fills across multiple prices.
Example
A small order in a highly active index future may fill close to the displayed price, while the same-sized order in a thin market could move through several price levels.
Common misunderstandings
- High trading volume and deep liquidity are related but not identical concepts.
- Liquidity is not constant throughout the day.
- Visible order-book liquidity can change quickly.
Educational reference
This glossary explains terminology and
general market concepts. It is not a
trading signal or a guarantee of future
results.