Nature of risk
Liquidity risk is the risk of not being able to sell assets or withdraw money at the right time without incurring large costs.
Foundational risk management is not intended to eliminate all possibility of loss. That is impossible in investing. The goal is to identify potential avenues for significant losses, limit the scale of losses, and keep investors in a position to continue when the market goes against expectations.
Analytical framework
Liquidity depends on market depth, bid-ask spread, order matching time, withdrawal regulations, product maturity and market sentiment. When a crisis occurs, assets that were thought to be easy to sell may become difficult to sell or have to be sold at very low prices.
A risk needs to be evaluated through three layers: probability of occurrence, severity of damage if it occurs, and ability to recover afterward. Many investors only focus on probability, for example 'this probability is low', but ignore that if it happens the consequences can break the entire plan.
Code of practice
Do not invest money needed in the short term in assets that may be locked, have sharp price declines, or have difficulty exiting positions when the market is bad.
Risk rules should be written into specific actions: weight limits, leverage limits, minimum cash levels, rebalancing thresholds, selling conditions or review schedules. If the rule cannot be measured, it is easy to ignore when emotions run high.
Mistakes to avoid
Looking only at high yields but ignore withdrawal times, trade spreads and the ability to sell in a crisis.
Great risks often accumulate when everything seems favorable. When short-term returns are good, it is easy for investors to increase positions, reduce cash or ignore conflicting data. Stress-test risk most carefully after a winning period, not just after a loss.