Coaching practices for Past Investment Decision Error

Describe almost anything you are working through and IX Coach finds the practices whose real-world fit is closest. For Past Investment Decision Error, these are the strongest matches in the current practice library.

Does this sound like the set of challenges you might be facing?

• I keep doubling down to justify the last round
• Every time I try to weigh whether to keep going, the years and money I’ve already poured in flood right back in and drown out the actual question
• I’m too tangled up in this to see it clearly
• Every single month investing is this fresh little decision I have to talk myself into, and most months I just don’t
• All I can feel is how much I’ll regret wasting everything I’ve already put in if I stop

Practices that may help

1. The Sunk Cost Fallacy: Escaping Bad Investments
   The sunk cost fallacy is the tendency to continue a losing course because of unrecoverable past investment rather than on the basis of future expected value. It is one of the most robustly documented biases in behavioral economics. The corrective is to evaluate forward-only: what will each path deliver from here, regardless of what has already been spent.
2. Actively watch for escalation of commitment
   Each new investment in a losing course makes the next exit harder — catch escalation early.
   The Sunk Cost Fallacy: Escaping Bad Investments
3. Zero out past investment before evaluating the forward decision
   Explicitly set prior investment to zero and evaluate only what each future path offers from here.
   The Sunk Cost Fallacy: Escaping Bad Investments
4. Apply the new investor test
   Ask: would a rational person who had not already invested choose to invest now?
   The Sunk Cost Fallacy: Escaping Bad Investments
5. Automate the investment so the decision is never repeated
   Set up automatic transfers on payday so investing happens before the money is available to spend.
   Dollar-Cost Averaging, Made Practical
6. Use regret minimization as a forward-looking check
   At 80, which will you regret more — stopping now, or having continued into a deeper hole?
   The Sunk Cost Fallacy: Escaping Bad Investments
7. Make the lump-sum vs DCA decision with honest math
   When you have a windfall, invest it in full unless the evidence for waiting is behavioral, not mathematical.
   Dollar-Cost Averaging, Made Practical
8. Distinguish sunk costs from future opportunity costs
   What you’ve already spent is irrelevant; what you’ll give up going forward is the only cost that matters.
   Opportunity Cost Thinking: What You Give Up When You Choose
9. Slow down on one-way doors
   For irreversible decisions, invest in deliberation proportional to the downside — not to your confidence.
   The Two-Way Door
10. Judge decisions by the process, not the result
    A good decision that produces a bad outcome is still a good decision.
    Expected Value Thinking: Deciding Under Uncertainty

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