The Only Investment Advice You Ever Need - Future IQ
Concepts in this episode
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Survivorship and Recall Bias in Self-Evaluation mental-model
Self-evaluation becomes inflated when memorable wins stand in for the full record. Competence can look like genius after losses, abandoned attempts, and forgone alternatives fade from recall.
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Null Hypothesis principle
Every claim of skill or special causation needs a live baseline. A result becomes meaningful only when it outperforms the simplest ordinary explanation or the passive alternative available without insight.
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Law of Large Numbers mechanism
A broad enough random sample starts to resemble the population it came from because stock-specific surprises partly cancel one another. That is why a randomly chosen basket of 30 stocks can roughly track the market’s return.
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Index Investing principle
Index investing makes the market return your default: unless you possess a genuine stock-picking or timing edge, own the basket instead of trying to outguess it.
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Overtrading Costs mechanism
Overtrading turns attempted portfolio improvement into repeated leakage. Frequent buying and selling can reduce returns through transaction costs, capital gains taxes, and badly timed intervention.
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Dunning-Kruger Effect mental-model
The Dunning-Kruger effect is a double failure: weak skill produces poor performance while also withholding the diagnostic skill needed to recognize it. Confidence is therefore not evidence of competence—and doubt can sometimes signal that a person knows enough to see the difficulty.
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Adverse Selection mechanism
Adverse selection means a trade is not merely a choice between an asset and your cash; it is also a contest against the information, incentives, and judgment of whoever willingly takes the other side.
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