Liquidity Risk

Liquidity risk is the risk that a trader or investor may not be able to buy or sell an asset quickly enough at a fair price due to insufficient market activity. In illiquid markets, wide bid-ask spreads and low trading volume can result in significant slippage or difficulty exiting positions. Liquidity risk is particularly relevant during times of market stress or when trading less popular instruments.

A trader holding a large position in a small-cap stock may find it difficult to exit quickly if the stock's daily volume is low, resulting in having to sell at a steep discount to get the trade filled. In a prop trading context, liquidity risk is managed by focusing on highly liquid instruments such as major forex pairs, large-cap equities, or major futures contracts. Prop traders must also consider liquidity when sizing positions, ensuring they are not building exposure so large that exiting would move the market against them.