By the end of this lesson you understand why the average investor, in practice, gets a lower return than the market they're investing in.
\nThere's a well-documented difference between the return a market offers -- or a fund or ETF that tracks it -- over a period, and the return the average investor in that same market actually gets. This difference is known as the investor return gap.
\nThis gap isn't because the market performs differently for each investor -- the index or fund has a single return for that period -- but because of the investor's own behavior: buying and selling at the wrong times, almost always driven by the emotion of the moment rather than a prior plan.
\nA common pattern: buying more once prices have already risen a lot, out of euphoria or fear of missing out, and selling once prices have already fallen a lot, out of panic -- instead of sticking to a consistent strategy throughout the period. That behavior systematically reduces the actual return obtained compared to what simply holding the investment without intervening would have delivered.
\nThe cognitive biases already covered in the previous lesson are, to a large extent, the cause of this behavior: loss aversion pushes people to sell at the worst possible moment, and confirmation bias reinforces decisions already made without questioning them in time.
\nAn investor who sells their position after a sharp market drop, out of fear of losing more, and only invests again once the market has already largely recovered, gets a real return much lower than they would have gotten by simply holding the investment through the entire drop and recovery.
\nThe investor return gap is the difference between what a market delivers and what the average investor actually gets, caused by buying and selling driven by the emotion of the moment instead of a prior plan.
\nWhy isn't the investor return gap caused by the market performing differently for each person?
\nWhat relationship does loss aversion, covered in the previous lesson, have with this return gap?
","sortOrder":2,"readingMinutes":6,"difficulty":"Básico"},"previous":{"id":26,"moduleId":9,"slug":"most-common-cognitive-biases-when-investing","title":"What are the most common cognitive biases when investing?","summary":"You recognize what a cognitive bias is and the two most relevant examples when investing: loss aversion and confirmation bias.","bodyMarkdown":"## Objectives\n\nBy the end of this lesson you recognize what a cognitive bias is and the two most relevant examples when investing: loss aversion and confirmation bias.\n\n## Content\n\nA cognitive bias is a systematic pattern of thinking that deviates from objective or rational judgment. It isn't a one-off mistake or a matter of intelligence -- it's a predictable tendency that affects most people, including experienced and professional investors.\n\n**Loss aversion** is the tendency to feel the pain of losing a given amount of money far more intensely than the pleasure of gaining that same amount. In practice, this leads to decisions that prioritize avoiding a loss -- even a small or already unavoidable one -- over objectively reasonable decisions, such as holding a losing investment longer than the situation justifies, just to avoid \"locking in\" that loss by selling.\n\n**Confirmation bias** is the tendency to seek out, interpret, and remember information that confirms what you already believe, while ignoring or downplaying information that contradicts it. An investor who has already decided an asset is a good investment tends to focus only on news that reinforces that idea, without giving equal weight to news that calls it into question.\n\nThese aren't the only biases that affect an investor -- overconfidence, for example, is another common pattern -- but loss aversion and confirmation bias are among the most studied and with the most documented practical impact. Recognizing them doesn't eliminate them automatically, but it's the necessary first step toward counteracting them with a more structured decision-making process, the topic of this module's last lesson.\n\n## Example\n\nHolding a losing stock for far longer than you would hold an equivalent gain, just because selling would \"lock in\" the loss, is a direct example of loss aversion acting on an investment decision.\n\n## Common mistakes\n\n- Thinking cognitive biases only affect beginner or inexperienced investors -- they're systematic patterns that also affect experienced investors, including professionals.\n- Confusing loss aversion with simple prudence -- prudence is a rational decision based on actual risk; loss aversion is a disproportionate emotional reaction, even when holding the position no longer has a rational justification.\n\n## Summary\n\nA cognitive bias is a systematic pattern of thinking that departs from objective judgment. Loss aversion and confirmation bias are two of the most common and most impactful when investing.\n\n## Self-check\n\nWhy can holding a losing investment \"to avoid locking it in\" be an example of loss aversion, not prudence?\n\nHow does confirmation bias show up in how someone looks for information about an investment they've already made?","bodyHtml":"By the end of this lesson you recognize what a cognitive bias is and the two most relevant examples when investing: loss aversion and confirmation bias.
\nA cognitive bias is a systematic pattern of thinking that deviates from objective or rational judgment. It isn't a one-off mistake or a matter of intelligence -- it's a predictable tendency that affects most people, including experienced and professional investors.
\nLoss aversion is the tendency to feel the pain of losing a given amount of money far more intensely than the pleasure of gaining that same amount. In practice, this leads to decisions that prioritize avoiding a loss -- even a small or already unavoidable one -- over objectively reasonable decisions, such as holding a losing investment longer than the situation justifies, just to avoid "locking in" that loss by selling.
\nConfirmation bias is the tendency to seek out, interpret, and remember information that confirms what you already believe, while ignoring or downplaying information that contradicts it. An investor who has already decided an asset is a good investment tends to focus only on news that reinforces that idea, without giving equal weight to news that calls it into question.
\nThese aren't the only biases that affect an investor -- overconfidence, for example, is another common pattern -- but loss aversion and confirmation bias are among the most studied and with the most documented practical impact. Recognizing them doesn't eliminate them automatically, but it's the necessary first step toward counteracting them with a more structured decision-making process, the topic of this module's last lesson.
\nHolding a losing stock for far longer than you would hold an equivalent gain, just because selling would "lock in" the loss, is a direct example of loss aversion acting on an investment decision.
\nA cognitive bias is a systematic pattern of thinking that departs from objective judgment. Loss aversion and confirmation bias are two of the most common and most impactful when investing.
\nWhy can holding a losing investment "to avoid locking it in" be an example of loss aversion, not prudence?
\nHow does confirmation bias show up in how someone looks for information about an investment they've already made?
","sortOrder":1,"readingMinutes":6,"difficulty":"Básico"},"next":{"id":28,"moduleId":9,"slug":"how-to-build-a-decision-process-not-a-hunch","title":"How do you build a decision-making process instead of a hunch?","summary":"You know how to build a decision-making process defined in advance, instead of deciding on impulse or a hunch.","bodyMarkdown":"## Objectives\n\nBy the end of this lesson you know how to build a decision-making process defined in advance, instead of deciding on impulse or a hunch.\n\n## Content\n\nAn investment plan is a set of criteria and rules defined in advance -- before the market moves and emotions get involved -- that guide decisions to buy, hold, or sell. Its main function is to counteract the cognitive biases and behavior that cause the investor return gap, already covered in this module.\n\nA reasonable investment plan defines, at minimum, three things: what to buy and why -- specific selection criteria, not a hunch of the moment -- how long the investment is meant to be held -- the time horizon, already covered in an earlier module -- and under what specific conditions it would be sold, defined in advance, not decided in the heat of the moment during a sharp market drop or rise.\n\nThe key difference from deciding on impulse lies precisely there: when the market drops sharply and fear kicks in, a plan already written in advance gives you an objective reference point to return to, instead of improvising a decision under the effect of loss aversion.\n\nHaving a plan doesn't eliminate risk or guarantee a result -- market risk still exists, as you already saw earlier -- but it does reduce the odds that a one-off decision, driven by the emotion of the moment, derails a strategy that was otherwise reasonable.\n\n## Example\n\nAn investor who decides in advance to hold their investment for a horizon of several years, unless something fundamental changes in their personal situation, has a clear reference point to return to when the market drops sharply -- instead of deciding to sell out of panic in that same moment, something you already saw systematically reduces actual return.\n\n## Common mistakes\n\n- Thinking an investment plan guarantees a good result -- it reduces the risk of impulsive decisions, but it doesn't eliminate market risk.\n- Defining an investment plan that's too vague, like \"invest for the long term,\" without specific criteria for selection, horizon, and sell conditions -- a plan without specific criteria gives no real reference point when deciding under pressure.\n\n## Summary\n\nAn investment plan defines in advance what to buy, how long to hold it, and under what conditions to sell -- an objective reference point that counteracts the temptation to decide on impulse when the cognitive biases covered in this module show up.\n\n## Self-check\n\nWhy does an investment plan defined in advance help counteract loss aversion during a market drop?\n\nWhy doesn't an investment plan guarantee a good result, even though it does reduce the risk of impulsive decisions?","bodyHtml":"By the end of this lesson you know how to build a decision-making process defined in advance, instead of deciding on impulse or a hunch.
\nAn investment plan is a set of criteria and rules defined in advance -- before the market moves and emotions get involved -- that guide decisions to buy, hold, or sell. Its main function is to counteract the cognitive biases and behavior that cause the investor return gap, already covered in this module.
\nA reasonable investment plan defines, at minimum, three things: what to buy and why -- specific selection criteria, not a hunch of the moment -- how long the investment is meant to be held -- the time horizon, already covered in an earlier module -- and under what specific conditions it would be sold, defined in advance, not decided in the heat of the moment during a sharp market drop or rise.
\nThe key difference from deciding on impulse lies precisely there: when the market drops sharply and fear kicks in, a plan already written in advance gives you an objective reference point to return to, instead of improvising a decision under the effect of loss aversion.
\nHaving a plan doesn't eliminate risk or guarantee a result -- market risk still exists, as you already saw earlier -- but it does reduce the odds that a one-off decision, driven by the emotion of the moment, derails a strategy that was otherwise reasonable.
\nAn investor who decides in advance to hold their investment for a horizon of several years, unless something fundamental changes in their personal situation, has a clear reference point to return to when the market drops sharply -- instead of deciding to sell out of panic in that same moment, something you already saw systematically reduces actual return.
\nAn investment plan defines in advance what to buy, how long to hold it, and under what conditions to sell -- an objective reference point that counteracts the temptation to decide on impulse when the cognitive biases covered in this module show up.
\nWhy does an investment plan defined in advance help counteract loss aversion during a market drop?
\nWhy doesn't an investment plan guarantee a good result, even though it does reduce the risk of impulsive decisions?
","sortOrder":3,"readingMinutes":6,"difficulty":"Básico"},"pathContext":null,"curatedLinks":{"prerequisite":[],"continuation":[],"related":[]},"relatedConcepts":[{"concept":{"id":34,"slug":"investor-return-gap","term":"Investor return gap","shortDefinition":"The difference between the return a market offers over a period and the return the average investor in that market actually achieves.","longDefinition":"The investor return gap is the difference between the return a market -- or a fund/ETF that tracks it -- offers over a period, and the return the average investor in that same market actually achieves. It isn't caused by the market performing differently for each investor, but by the investor's own buying and selling behavior: buying once prices have already risen a lot and selling once they've already fallen a lot, driven by the emotion of the moment rather than a prior plan. Cognitive biases -- in particular loss aversion and confirmation bias -- are, to a large extent, the cause of this behavior."}}]}