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"},"previous":null,"next":{"id":84,"moduleId":30,"slug":"how-do-you-periodically-review-a-portfolio","title":"How do you periodically review a portfolio?","summary":"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.","bodyMarkdown":"## Objectives\n\nBy 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.\n\n## Content\n\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.\n\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.\n\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.\n\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.\n\n## Example\n\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.\n\n## Common mistakes\n\n- Confusing \"reviewing the portfolio\" with \"rebalancing the portfolio\" -- reviewing can lead to changing the target allocation; rebalancing always returns to an already-decided allocation.\n- Reviewing the portfolio reactively, only when the market moves sharply, instead of with the discipline set by the investment plan.\n- Selling positions during a review without considering the tax cost of that sale or the possibility of applying loss offsetting.\n\n## Summary\n\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.\n\n## Self-check\n\nWhy isn't reviewing a portfolio the same as rebalancing it?\n\nWhy is it worth reviewing a portfolio with the discipline set by an investment plan, instead of reacting to a specific market move?","bodyHtml":"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"},"pathContext":null,"curatedLinks":{"prerequisite":[],"continuation":[],"related":[]},"relatedConcepts":[{"concept":{"id":79,"slug":"asset-allocation","term":"Asset allocation","shortDefinition":"The decision of what percentage of a portfolio goes to each asset class -- the central decision in building a portfolio, distinct from choosing which specific asset to buy within each class.","longDefinition":"Asset allocation is the decision of what percentage of a portfolio goes to each asset class -- stocks, bonds, ETFs, investment funds, commodities, currencies, all already covered in Level 1. It isn't choosing which specific stock or fund to buy within each class -- that's a later decision. According to numerous portfolio management studies, it's the decision that most influences a portfolio's long-term result, because different asset classes behave differently in response to the same events: combining them in the right proportions is the main lever for adjusting the risk and expected return of an entire portfolio, both already covered in Level 1. The right allocation depends on the investor's risk profile, their time horizon, and their liquidity needs."}},{"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":81,"slug":"diversification","term":"Diversification","shortDefinition":"Combining assets in a portfolio that don't all behave the same way in response to the same events, to reduce risk without proportionally reducing expected return -- it reduces risk, it doesn't eliminate it.","longDefinition":"Diversification is the practice of combining assets in a portfolio that don't all behave the same way in response to the same events -- when some fall, others don't fall to the same degree, or even rise -- which reduces the portfolio's overall risk without proportionally reducing its expected return. It operates within the asset allocation already decided, covered in Module 1: it spreads the capital assigned to each asset class across several specific assets, instead of concentrating it in just one. It can be applied across different dimensions -- for example, geographically and by sector -- all of them forms of the same idea. Diversification reduces risk, but doesn't eliminate it: part of the risk affects the market as a whole, and no allocation of capital within that market eliminates it completely."}},{"concept":{"id":82,"slug":"concentration-risk","term":"Concentration risk","shortDefinition":"The risk that arises from having too much capital in too few positions, sectors, or geographic regions, such that a single event can affect a disproportionate part of the portfolio -- reduced by diversification.","longDefinition":"Concentration risk is the risk that arises from having too much capital invested in too few positions, sectors, or geographic regions, such that a single event can affect a disproportionate part of the portfolio. It isn't a different kind of uncertainty from risk, already covered in Level 1 -- it's a specific form of risk that depends on how the portfolio as a whole is structured, not on the uncertainty of each asset considered separately: a portfolio can have high concentration risk even if no individual position, considered on its own, is especially risky. Diversification, already covered in Module 2, is precisely the practice that reduces this risk."}},{"concept":{"id":83,"slug":"correlation","term":"Correlation","shortDefinition":"The tendency of two assets to move in the same direction, in opposite directions, or independently in response to the same events -- the real mechanism through which diversifying reduces a portfolio's risk.","longDefinition":"Correlation measures the tendency of two assets to move in the same direction, in opposite directions, or independently in response to the same events. Two highly correlated assets tend to rise and fall together; two assets with low or negative correlation don't move similarly, or even move in opposite directions. It's the real mechanism behind the benefit of diversifying, already covered in general terms in Module 2: combining assets with low correlation to each other reduces the portfolio's overall risk more than combining highly correlated assets would. It shouldn't be confused with volatility, already covered in Level 1: volatility measures how much a single asset moves on its own, while correlation measures how two assets move relative to each other -- an asset can be very volatile and, at the same time, have low correlation with another."}},{"concept":{"id":84,"slug":"position-sizing","term":"Position sizing","shortDefinition":"The criterion for deciding how much weight a position should have in a portfolio based on how much concentration risk it introduces and how correlated it is with the rest -- a tool for controlling its contribution to risk, not a universal formula.","longDefinition":"Position sizing is the criterion for deciding how much weight a specific position should have within a portfolio, inside the asset allocation already decided in Module 1. It rests on two factors: the concentration risk a position introduces -- the greater its weight, the greater the part of the portfolio exposed to whatever happens specifically to that position -- and its correlation with the rest of the portfolio -- a position highly correlated with the others contributes more to overall risk than one with low correlation, even with the same nominal weight. It's a tool for controlling how much a specific position contributes to a portfolio's risk, not a universal formula or a fixed percentage that automatically determines how much anyone should invest in any position."}}]}