Mechanism
Holding is not free. Many venues apply financing (swap/rollover/funding) for overnight exposure.
With leverage, small daily financing charges become meaningful. They reduce your effective expectancy and can turn a flat or slightly positive trade into a bleed.
Financing is also not always stable. In stress, funding conditions and broker policies can change, and costs can spike when you least want them to.
Process upgrade: turn this truth into a rule you can actually enforce. If the rule can’t be enforced, it will be broken under stress.
- Write the trigger condition in observable terms.
- Write the action in one sentence.
- Write the penalty for breaking it.
How it kills accounts
Enter trade → hold longer than planned → financing bleeds → become anchored → refuse to exit because ‘it’s close’ → time increases exposure to gap events → damage.
How it kills accounts:
- The rule exists only in your head.
- Stress arrives and you improvise.
- Improvisation becomes inconsistency.
- Inconsistency becomes random results.
- Random results become a slow bleed.
Rule that survives
Include financing in expectancy for any trade held overnight.
If carry is negative, define a maximum holding time (time stop) or require a larger edge.
Review financing terms before size, not after regret.
Rule that survives:
- Write the trigger in observable terms.
- Write the action in one sentence.
- Write the penalty for breaking it.
Example archetype
You hold a leveraged position for weeks because the thesis ‘should play out’. Price chops. Financing quietly drips until the trade becomes a loss without any dramatic move.
Tell: if your rule isn’t enforceable, it’s a suggestion. Suggestions don’t survive stress.
Deep dive
Time is not neutral
Financing is the market charging you to keep the position open.
Related: Time is a stop-loss nobody uses and Costs are a strategy.
Glossary: carry, swap/rollover, time stop, opportunity cost.
Field checklist
- Write the rule in observable terms: if X, then Y.
- Remove choices under stress. Choices become rationalizations.
- Track the precursor: what state were you in before the mistake?
- Make deviations costly (size down, pause, review).
- Turn lessons into gates, not notes.