# Bid-Ask Spread

*Markets & Instruments — Finicade finance glossary*

The gap between the highest price buyers will pay (bid) and the lowest sellers will accept (ask). It's the market-maker's fee and a live readout of liquidity — tight in busy markets, wide in thin ones.

**Also known as:** bid-offer spread

**Related terms:** [Liquidity](https://finicade.com/glossary/liquidity), [Market Maker](https://finicade.com/glossary/market-maker), [Volatility](https://finicade.com/glossary/volatility)

**Taught in:** Risk Arena — Liquidity Risk: When the Exit Jams

Source: https://finicade.com/glossary/bid-ask-spread