Nature of risk
Risk in investing is not just the ups and downs of prices, but the possibility of losing capital, losing liquidity, missing goals or being forced to make decisions in unfavorable conditions.
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
You need to distinguish between temporary fluctuations, permanent capital loss, liquidity risk, behavioral risk and risk of not achieving goals. An asset with highly volatile prices is not necessarily the riskiest if its long-term value remains intact; by contrast, assets that look stable can be very risky if they lose their ability to pay their debts or cannot be sold when they need money.
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
Before looking for profits, write clearly in what ways you can lose money and what situations will disrupt your financial plan.
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
Identify your risk with daily price fluctuations, then avoid any fluctuating assets while ignoring the risk of loss of purchasing power or debt risk.
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.