Liquidity providers are market participants who offer to buy and sell securities continuously, providing the liquidity that enables smooth market functioning. These include market makers, banks, high-frequency trading firms, and institutional traders who quote both bid and ask prices. Liquidity providers profit from bid-ask spreads while facilitating trading for other market participants.

Liquidity providers use sophisticated technology and risk management systems to adjust pricing and inventory based on market conditions. During volatile periods, liquidity providers may widen spreads or reduce position sizes to manage risk, potentially affecting market liquidity. Understanding liquidity provider behavior helps traders anticipate market conditions and execution quality.

Real-world example: A major bank serves as a liquidity provider in USD/JPY, continuously quoting bid and ask prices with 1-pip spreads during normal conditions but widening to 3-pip spreads during Bank of Japan policy announcements to manage increased volatility risk.