Nature of risk
Risk capacity is the amount of financial risk you can afford to take; risk tolerance is the psychological level of risk you believe you can handle.
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
Risk tolerance depends on income, emergency funds, debt, dependents, investment horizon and goals. Risk tolerance depends on emotions, experience, reactions to losses, and how well you sleep when the portfolio fluctuates. A good plan must respect both, but prioritize financial constraints first.
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
If a hypothetical loss of 20-30 percent causes you to sell to pay living expenses or lose sleep over time, the risk weight is too high.
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
Assessing your risk tolerance when markets are rising, then discovering you cannot tolerate the drawdown when markets actually fall.
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.