By the end of this lesson you understand how and when to periodically review a portfolio to keep it consistent with the investor's risk profile and time horizon, beyond rebalancing a drifted position.
\nModule 4 already explained when and by what criteria to rebalance a portfolio that has drifted from its target allocation -- by calendar or by deviation threshold. This lesson doesn't repeat those criteria: it covers periodic review in a broader sense, of which rebalancing is only one possible action, not the only one.
\nPeriodically reviewing a portfolio means checking whether it's still consistent with the investor's risk profile and time horizon -- not just whether each position's weight has drifted from the original allocation. Life circumstances change: a change in income, an approaching financial goal, or a real shift in the investor's risk tolerance can justify reviewing the asset allocation itself, not just readjusting it to the one that already existed. This is different from rebalancing: rebalancing returns the portfolio to an already-decided allocation; reviewing the risk profile and horizon can lead to deciding on a different allocation -- and only then, if warranted, rebalancing toward it.
\nThe investment plan, already covered in Level 1, is what gives this process discipline: it defines in advance when and by what criteria the portfolio is reviewed, instead of reacting impulsively to a specific market move. Reviewing a portfolio with that discipline reduces the odds that an impulsive decision -- selling out of panic during a drop, or concentrating the portfolio in whatever has performed best recently -- replaces the judgment already built in the earlier modules.
\nThe periodic review is also the moment to reconsider the accumulated tax cost, already covered in Module 5: a review that ignores the capital gain generated by a sale, or the possibility of applying loss offsetting, can generate more tax cost than necessary without really improving the portfolio.
\nAn investor reviews their portfolio once a year, according to their own investment plan. In one of those reviews, they notice their time horizon has shortened significantly -- the moment they'll need that money is approaching -- and decide, for that reason, to reduce the weight of stocks in their asset allocation. This isn't a rebalancing toward the previous allocation, but a review that changes the target allocation itself.
\nPeriodically reviewing a portfolio means checking whether it's still consistent with the investor's risk profile and time horizon -- not just whether it has drifted from its target allocation. Rebalancing, already covered in Module 4, is one possible action resulting from that review, not the whole review. The investment plan gives the process discipline, and the accumulated tax cost should be considered at every review.
\nWhy isn't reviewing a portfolio the same as rebalancing it?
\nWhy is it worth reviewing a portfolio with the discipline set by an investment plan, instead of reacting to a specific market move?
","sortOrder":2,"readingMinutes":7,"difficulty":"Intermedio"},"previous":{"id":83,"moduleId":30,"slug":"how-do-you-build-an-investment-portfolio-step-by-step","title":"How do you build an investment portfolio, step by step?","summary":"You know how to combine the asset allocation, diversification, and risk management already covered in this level to build a real investment portfolio, step by step.","bodyMarkdown":"## Objectives\n\nBy the end of this lesson you know how to combine the asset allocation, diversification, and risk management already covered in this level to build a real investment portfolio, step by step.\n\n## Content\n\nThis level's five previous modules introduced, one by one, the criteria that make up a coherent portfolio: asset allocation based on risk profile and time horizon, diversification, managing concentration risk and correlation, rebalancing, and investor taxation. This lesson doesn't add any new criterion -- it brings together the ones already covered into a practical sequence.\n\nThe starting point is always the same: asset allocation, already covered in Module 1, decided from the investor's risk profile and time horizon. That allocation sets, in general terms, what proportion of the portfolio would correspond to each asset class -- stocks, bonds, ETFs, investment funds, commodities, or currencies, all already covered in Level 1 -- before choosing any specific instrument.\n\nOnce the allocation is set, the next step is diversifying within each asset class and across them, already covered in Module 2: combining assets that don't all behave the same way reduces the portfolio's risk without proportionally reducing expected return. Diversifying isn't simply adding up different instruments -- it's watching, as Module 3 showed, that no position concentrates a disproportionate risk, taking into account how the chosen positions relate to each other.\n\nSizing each position, also covered in Module 3, is what translates the allocation and diversification into concrete numbers: how much weight each position gets within the portfolio, consistent with its contribution to overall risk, not just with the investor's conviction in that specific idea.\n\nFinally, building a portfolio doesn't end at the moment of purchase. The tax cost of trades -- already covered in Module 5 -- and the future need to rebalance -- already covered in Module 4 -- are part of the criteria from the start, not an afterthought: a well-built portfolio anticipates that it will need to be reviewed over time, a topic the next lesson develops.\n\n## Example\n\nAn investor with a long time horizon and a risk profile that tolerates swings decides, based on their asset allocation, to put most of the portfolio into stocks and a smaller part into bonds. Within the stock portion, they diversify across several companies and sectors instead of concentrating the investment in just one; within the bond portion, they do the same across several issuers. Position weights have been set accounting for their contribution to concentration risk and how they relate to the rest of the positions.\n\n## Common mistakes\n\n- Choosing the specific instruments first and deciding the asset allocation afterward, instead of the other way around -- the allocation should precede the selection, not follow it.\n- Confusing \"diversifying\" with \"accumulating many different instruments\" without watching the real correlation between them.\n- Building the portfolio without considering from the start that it will have a tax cost and will need rebalancing -- treating both as a later surprise instead of a design criterion.\n\n## Summary\n\nBuilding a real portfolio means applying, in sequence, the criteria already covered in this level: asset allocation based on risk profile and time horizon, diversification within and across asset classes, sizing each position based on its contribution to overall risk, and anticipating the tax cost and the future need to rebalance.\n\n## Self-check\n\nWhy should asset allocation be decided before choosing the specific instruments that will make up the portfolio?\n\nWhy isn't diversifying the same as simply accumulating different instruments?","bodyHtml":"By the end of this lesson you know how to combine the asset allocation, diversification, and risk management already covered in this level to build a real investment portfolio, step by step.
\nThis level's five previous modules introduced, one by one, the criteria that make up a coherent portfolio: asset allocation based on risk profile and time horizon, diversification, managing concentration risk and correlation, rebalancing, and investor taxation. This lesson doesn't add any new criterion -- it brings together the ones already covered into a practical sequence.
\nThe starting point is always the same: asset allocation, already covered in Module 1, decided from the investor's risk profile and time horizon. That allocation sets, in general terms, what proportion of the portfolio would correspond to each asset class -- stocks, bonds, ETFs, investment funds, commodities, or currencies, all already covered in Level 1 -- before choosing any specific instrument.
\nOnce the allocation is set, the next step is diversifying within each asset class and across them, already covered in Module 2: combining assets that don't all behave the same way reduces the portfolio's risk without proportionally reducing expected return. Diversifying isn't simply adding up different instruments -- it's watching, as Module 3 showed, that no position concentrates a disproportionate risk, taking into account how the chosen positions relate to each other.
\nSizing each position, also covered in Module 3, is what translates the allocation and diversification into concrete numbers: how much weight each position gets within the portfolio, consistent with its contribution to overall risk, not just with the investor's conviction in that specific idea.
\nFinally, building a portfolio doesn't end at the moment of purchase. The tax cost of trades -- already covered in Module 5 -- and the future need to rebalance -- already covered in Module 4 -- are part of the criteria from the start, not an afterthought: a well-built portfolio anticipates that it will need to be reviewed over time, a topic the next lesson develops.
\nAn investor with a long time horizon and a risk profile that tolerates swings decides, based on their asset allocation, to put most of the portfolio into stocks and a smaller part into bonds. Within the stock portion, they diversify across several companies and sectors instead of concentrating the investment in just one; within the bond portion, they do the same across several issuers. Position weights have been set accounting for their contribution to concentration risk and how they relate to the rest of the positions.
\nBuilding a real portfolio means applying, in sequence, the criteria already covered in this level: asset allocation based on risk profile and time horizon, diversification within and across asset classes, sizing each position based on its contribution to overall risk, and anticipating the tax cost and the future need to rebalance.
\nWhy should asset allocation be decided before choosing the specific instruments that will make up the portfolio?
\nWhy isn't diversifying the same as simply accumulating different instruments?
","sortOrder":1,"readingMinutes":7,"difficulty":"Intermedio"},"next":null,"pathContext":null,"curatedLinks":{"prerequisite":[],"continuation":[],"related":[]},"relatedConcepts":[{"concept":{"id":35,"slug":"investment-plan","term":"Investment plan","shortDefinition":"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.","longDefinition":"An 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. At a minimum, it defines what to buy and why, how long the investment is meant to be held, and under what specific conditions it would be sold. Its main function is to counteract the cognitive biases and behavior that cause the investor return gap: it gives an objective reference point to return to when the market moves sharply, instead of improvising a decision under emotional pressure. It doesn't eliminate market risk or guarantee a result, but it does reduce the odds that one impulsive decision derails an otherwise reasonable strategy."}},{"concept":{"id":80,"slug":"risk-profile","term":"Risk profile","shortDefinition":"An investor's willingness and ability to take on the uncertainty of an investment -- a characteristic of the person, not the investment, distinct from a specific asset's risk.","longDefinition":"Risk profile is an investor's willingness and ability to take on the uncertainty of an investment -- it shouldn't be confused with risk, already covered in Level 1: risk measures the uncertainty of a specific investment's outcome, while risk profile measures how much of that uncertainty a particular investor can tolerate and take on. It has two components that can fail to align: tolerance, how psychologically comfortable the investor feels with their portfolio's swings, and capacity, whether they can afford, financially, to wait for a drop to recover without putting their goals at risk. An investor's risk profile is one of the factors that shapes their asset allocation."}},{"concept":{"id":85,"slug":"rebalancing","term":"Rebalancing","shortDefinition":"Bringing a portfolio's actual weights back toward its target allocation when they've drifted from it -- not deciding a new allocation, but readjusting the portfolio relative to the one already decided.","longDefinition":"Rebalancing is the action of bringing a portfolio's actual weights back toward its target asset allocation, already decided in Module 1, when those weights have drifted from it -- selling part of what has grown above its target weight, buying what has fallen below, or both. It isn't deciding a new asset allocation: the target allocation stays the same, and rebalancing is the action of readjusting the portfolio relative to it, not changing it. Without rebalancing, a portfolio can drift over time toward unwanted concentration risk, already covered in Module 3, and lose part of the benefit of the diversification decided in Module 2. It involves buying and selling, which carries a transaction cost and can generate a real tax cost that must be weighed against the benefit of correcting the drift."}},{"concept":{"id":87,"slug":"capital-gain","term":"Capital gain","shortDefinition":"A gain subject to tax when an asset is sold for a higher price than was paid for it -- it materializes on sale, not before, and shouldn't be confused with any valuation method.","longDefinition":"A capital gain is the taxable gain obtained when selling an asset for a higher price than was paid for it -- already mentioned in Module 4 as the tax cost of rebalancing a position that has gained value. It's calculated on the real purchase and sale prices, and it materializes only upon sale: as long as the asset isn't sold, there's no taxable capital gain, no matter how much its price has risen. It shouldn't be confused with intrinsic value or the margin of safety, already covered in Level 3 -- those are tools for deciding at what price to buy or sell, while a capital gain is the tax figure resulting from a sale that has already happened."}},{"concept":{"id":88,"slug":"loss-offsetting","term":"Loss offsetting","shortDefinition":"A tax mechanism that lets investment losses be offset against capital gains, reducing the taxable base -- a neutral tax mechanism, not a psychological bias.","longDefinition":"Loss offsetting is the tax mechanism that lets certain investment losses be offset against capital gains and, in cases provided for by regulation, against other income that forms part of the savings tax base, thereby reducing the overall taxable base. It's a purely neutral tax mechanism -- it has nothing to do with loss aversion, already covered in Level 1, which is the psychological tendency to feel the pain of a loss more intensely than the pleasure of an equivalent gain. They're distinct concepts: one describes how a portfolio is taxed, the other describes a bias in an investor's decision-making."}}]}