Idea Ripper // ArchiveCards: 1555 [Live] | Updated: 2026-10-14
Card #c1296IR // #c1296Synthesis

"Mental capital is an important, underappreciated and finite resource." "This sort of trade could be mathematically positive EV but be so mentally taxing that even when it works, it has cost you more than you earned."

— In our words · Source: Trade Outside the Box (Brent Donnelly)

[Use when]

A project looks good on paper and would occupy your head every day for months.

[Why it matters]

Long, stressful, attention-hungry positions drain focus from everything else. People tend to bail out of them early just to relieve the anxiety. Donnelly counts that drain as a real cost of the position.

Filed under situations:When you’re stuck and running on emptyWhen you must decide and the facts aren’t in

More from Trade Outside the Box

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Same situation, different book

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