Your costliest investment error
Question
What is the worst investment mistake you have made?
Short answer
Describe a real trade or investment, why you made it, what went wrong and what you changed afterwards. Interviewers want to see ownership and a process lesson (position sizing, ignoring a stop, confirmation bias), not luck. Quantify the loss and the improvement in your process.
Adapted from Crack, Heard on the Street, Q5.1.23, p.47; question and answer rewritten by SelfMadeQuant.com.
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