Risk management is the framework that keeps a market decision reviewable when the market disagrees.
01 / Purpose
Risk management gives a decision a boundary.
Every market decision has uncertainty. Risk management makes that uncertainty explicit through size, limits, stop conditions, exposure awareness and escalation rules. It is not a set of slogans applied after a difficult trade.
A good control does not say the market cannot move against you. It says what happens if it does, who is responsible and how the next decision will be reviewed.
02 / Controls
Use multiple controls rather than one fragile rule.
Position sizing, loss limits, concentration limits, event-risk constraints and execution checks address different problems. A fixed stop can help limit a single trade, but it may not address liquidity gaps, correlated exposure or repeated decision errors.
Controls must fit the product, time horizon, account, venue and participant. A generic rule copied from another market can create a false sense of security.
03 / Review
A loss can be informative; an unexamined process cannot.
A trade can lose even when the initial process was sound, and a trade can make money despite a poor process. Separating those two ideas is central to serious review.
Keep the original thesis, size, risk limit, execution notes and post-trade assessment together. Over time, that record helps identify whether errors come from analysis, timing, sizing, implementation or rule discipline.