Definition
A liquidity provider makes trading capacity available to a market. In an order-book setting, this can mean placing resting buy or sell orders. Professional firms may quote across many pairs or venues, while an ordinary trader can supply liquidity through a qualifying resting order. In DeFi, the term can instead describe a contributor to a liquidity pool.
How It Works
When another participant trades against the supplied interest, the provider’s order executes and its inventory changes. Providers may seek spread income or qualify for fee incentives, but the compensation depends on actual execution and platform rules. Merely submitting a limit order does not ensure liquidity provision if it immediately crosses existing quotes.
Key Considerations
Providers face inventory risk and adverse selection: their quotes may be taken just before prices move against them. They may cancel or widen quotes when conditions change, so displayed liquidity can disappear. The broad role should be distinguished from a specific exchange program or DeFi pool position, each of which has additional eligibility, capital, and risk mechanics.