How does liquidity work in financial markets?

Liquidity reflects how easily assets can be bought or sold without significant price changes, depending on market participants and volume. In practical terms, liquidity is created by the continuous interaction of buyers and sellers — the more participants actively placing orders at various price levels, the deeper the market becomes, and the more smoothly transactions can be processed.

Liquidity operates on multiple levels. At the instrument level, major assets such as EUR/USD, gold, or large-cap stocks tend to be highly liquid because they attract a large number of participants globally. Smaller or more niche instruments — such as exotic currency pairs or shares of lesser-known companies — typically have lower liquidity, meaning that executing orders in these markets may take longer and involve wider spreads. At the market level, liquidity fluctuates throughout the day depending on which financial centres are active — for example, forex liquidity peaks when the London and New York sessions overlap.

Liquidity is maintained by a variety of participants, including retail traders, institutional investors, banks, and specialised market makers who continuously provide bid and ask prices. When liquidity is strong, the market functions efficiently — orders are filled quickly, spreads remain tight, and prices move in a more orderly fashion. During periods of reduced liquidity, such as public holidays, late-night sessions, or around major unexpected events, trading conditions can become less predictable. Being aware of how liquidity works helps traders time their activity more effectively and manage their expectations around execution quality.