How to Build a Stock Portfolio in India: Structure, Weights and Rebalancing

Direct Equity — Arc 3, Article Three

The Sequence

Build in the right order, or the rest does not matter

Almost every retail portfolio in India was built in the wrong order. It began with a share — something a colleague mentioned, something in the news — and the structure was reverse-engineered afterwards, if at all. Building forward instead takes an afternoon and changes the outcome more than any individual holding will.

Step one: money that must not be in equities. An emergency fund and anything you need within about five years sit outside the market entirely. This is not caution, it is arithmetic: money with a short deadline cannot survive an ordinary fall, and forced selling in a bad month is how paper losses become permanent ones.

Step two: the equity share of everything you own. How much of your total net worth belongs in equities, across all forms — direct shares, mutual funds, employee shares, retirement accounts. That single number moves your results more than every stock decision you will ever make, and it is settled in the asset allocation article, not here.

Step three: split that equity money into core and satellite. The core owns the market cheaply. The satellite is where your own selection happens. The split is a decision about how much of your outcome you want to depend on your own picking, and the evidence in the index versus stock picking article is the reason the honest default puts the core first.

Step four: convert the satellite into rupees, then into positions. Only now do individual companies enter the conversation — how many, at what weight, with what caps. This is the step everybody starts at, and starting here is why so many portfolios are a pile of holdings rather than a portfolio.

Step five: write down the maintenance rules before you need them. When you will review, what triggers a rebalance, what justifies a sale. Rules written while calm are the only ones that survive a market that is not.

Core And Satellite

The core satellite portfolio, in actual percentages

The structure is simple. A core of broad, low-cost index funds holds the bulk of your equity money and delivers the market’s return minus a small fee — no selection required and no way to be badly wrong. A satellite of directly held companies is where your research is expressed, sized so that a poor decade of picking is a disappointment rather than a disaster. The index funds and ETFs article covers how to build the core itself.

What follows is illustrative — the point is the shape, not the exact figure. Assume ₹20,00,000 of equity money in each case.

Where you are	Core in index funds	Satellite in direct shares	What has to be true
New to stock picking	90% — ₹18,00,000	10% — ₹2,00,000	Nothing. This is the starting allocation for someone with no tracked record, and it should feel small
Two or three years in, records kept	80% — ₹16,00,000	20% — ₹4,00,000	You have measured your all-in returns against a broad index and you are not behind it
Long record, process, temperament proven	60–70%	30–40%	Several years of tracked results through at least one bad market, not one good run
No appetite for picking	100%	Nil	Also a complete, entirely respectable answer, and the data says it beats most people who try

Two features of that table are doing all the work. First, the satellite is earned, never assumed — promotion to a larger share comes from a measured record, not from confidence, and the measurement is described at the end of this article. Second, even at the largest satellite, most of the money is still in the core. That is not timidity. It is the structure that lets you pick shares at all without your retirement depending on whether you were right.

One practical note on the core. Your index fund rebalances itself: the exchange reviews its indices on a schedule and the fund follows, dropping companies that no longer qualify and adding those that do. NSE, for instance, reviews the Nifty 50 twice a year on a published methodology, which you can read on the exchange’s own index page. The maintenance work in this article is therefore almost entirely about the satellite and about the split between the two.

How Many

How many stocks to own — and why the answer is not “more”

Two forces pull in opposite directions here, and the sensible answer sits where they meet.

The force pushing the number up. Company-specific disasters — a fraud, a lost customer, a regulator — are survivable only if no single company can take a large bite. Going from one holding to five removes an enormous amount of that risk. Five to ten removes a good deal more. Ten to twenty removes a little. Twenty to forty removes almost nothing, because what remains is the market’s own risk, and no amount of adding companies can remove that.

The force pushing the number down is your calendar, and it is underrated. Owning a company properly means reading four quarterly results a year, an annual report, and whatever material announcements arrive in between. Twelve holdings is therefore forty-eight sets of results plus twelve annual reports every year. At an honest hour and a half per result and four or five hours per annual report, that is well over a hundred hours — roughly two and a half hours every week, permanently, before you have researched anything new. The research process article sets the same ceiling from the other direction.

Where they meet, for most people with jobs, is eight to fifteen companies. Below about six, one mistake dominates everything. Above about twenty, two things happen at once: the marginal safety is negligible, and you stop actually reading, which means you now own a badly assembled index fund at a much higher cost and with far more work. If your list has drifted past twenty because you kept adding without ever removing, the honest response is not more diversification. It is a cull.

One caution the textbooks skip: this count only means anything if the holdings are genuinely different. Fifteen companies that all depend on the same interest rate cycle are, for risk purposes, closer to three. That is the per-thesis cap from the previous article, and it binds harder than the headcount.

Weighting

How much in each holding

Three approaches are in common use, and each is defensible for different reasons.

Equal weight. Ten holdings, 10% each. Its great virtue is that it makes no claim to know which idea is best, which is honest, because the evidence on individual investors’ ability to rank their own ideas is unkind. It also forces a discipline most people avoid: to add a new company you must make room, which keeps the list at a size you can actually follow.

Conviction weight. More money in the ideas you believe most. Intuitive, and occasionally correct. Its problem is that conviction is produced by the same mind that produces the errors in the beginner mistakes article — familiarity, a good story, a recent rise. Strength of feeling is not the same as strength of evidence, and few people can tell the difference in the moment.

Risk weight. Size each position so that being wrong about it costs the same as being wrong about any other — the formula from the sizing article, where a company you would exit only after a large fall gets less money than one with a tight, defined exit. This is the most rigorous of the three, and the most work.

A defensible middle for most people: start near-equal, allow modest tilts of one and a half or two times the base weight where the evidence is stronger — longer record, clearer accounts, more predictable business — never where the excitement is stronger, and cap everything at the per-position ceiling you set in advance. Then let the position sizing formula override any of it when it produces a smaller number. Our position size calculator handles that arithmetic.

Two tilts deserve a hard limit regardless of conviction: smaller and thinly traded companies, where you may not be able to exit at a sensible price, and anything you have owned for less than a full reporting year. Both are situations where your information is thinner than it feels.

Drift

Why a portfolio you never touch stops being the portfolio you chose

Weights do not stay where you put them. Winners grow, losers shrink, and after a few years the portfolio quietly becomes something you never agreed to. Take ten equal holdings of ₹1,00,000 each, three years on:

Group	At purchase	Weight then	Three years later	Weight now
The best holding	₹1,00,000	10.0%	₹3,00,000	22.9%
Two good ones	₹2,00,000	20.0%	₹4,00,000	30.5%
Five steady ones	₹5,00,000	50.0%	₹5,00,000	38.2%
Two disappointments	₹2,00,000	20.0%	₹1,10,000	8.4%
Total	₹10,00,000	100%	₹13,10,000	100%

Nothing here was a mistake. The portfolio is up 31% and the process worked. But the 10% cap you carefully set is now a 23% position, and three holdings out of ten carry more than half the money. The same drift happens one level up: a 60% equity allocation becomes 72% after a strong run, so your overall risk quietly rose while you were pleased about the returns. Rebalancing is simply the act of noticing.

Rebalancing

Portfolio rebalancing in India without handing it all to tax

Rebalancing textbooks are usually written for markets where selling inside a retirement account costs nothing. In India, outside such wrappers, every sale is a taxable event and a fee event, so the textbook advice to “rebalance annually to target” can quietly cost more than the drift it corrects. The fix is to change the trigger and the order of operations.

Use bands, not dates. A calendar rebalance forces trades whether or not anything has moved. A band rebalance acts only when a weight has actually drifted — for instance, when a holding moves more than a quarter away from its target in relative terms, so a 10% target becomes actionable outside roughly 7.5% to 12.5%, and an asset class outside five percentage points of its target. The practical hybrid is to check on a schedule, once or twice a year, and act only on what is outside its band. Most years, that means doing very little, which is the correct amount of activity.

Rebalance with new money first. This is the single most useful habit in the article. If your equity share has grown too large, point the next few months of savings and systematic investments at whatever is underweight instead of selling anything. Nothing is realised, no tax arises, no brokerage is paid, and the drift corrects itself. For anyone still adding to their portfolio each month, new money alone handles most rebalancing needs for years. Redirecting dividends does the same job on a smaller scale.

When you must sell, sell thoughtfully. Trim rather than exit — selling a third of an oversized winner usually restores the cap, and selling the whole thing to hit a target exactly is churn wearing a discipline costume. Prefer lots that qualify as long-term over recently bought ones, because the tax treatment differs sharply by holding period. Use the annual long-term exemption deliberately rather than accidentally. Consider splitting a large trim across two financial years. And if you are carrying realised losses, offsetting them against gains in the same year is free money that most people leave on the table. Note also that within a demat account, shares are treated as sold in the order they were bought, so you do not get to choose which lot goes — a detail that matters when you have accumulated the same company over years. The equity taxation article carries the current rates, holding periods and exemption limits; treat this section as the shape and that one as the numbers, and verify before acting.

Rebalance the split before the holdings. If the whole satellite has outgrown its share of your equity money, correcting that matters more than tidying weights inside it. Fix the largest imbalance first, then stop. Precision here is worthless; you are managing exposure, not aligning a spreadsheet.

Selling

When to sell stocks: three reasons, and no others

Most investors have a detailed buying process and no selling process whatsoever, which is why selling decisions get made in a hurry, at the worst moments, on the least relevant information. Three reasons justify a sale. Everything else is noise dressed as analysis.

One: the reason you bought it is no longer true. The written thesis has been contradicted — margins have deteriorated with no credible explanation, the balance sheet has changed character, governance signals have appeared, the competitive position has broken, or management has done something that fails your standards. Note that this is about the business, not the price. It is also why the thesis must exist in writing before purchase; without it, there is nothing for reality to contradict.

Two: the position has outgrown its place. A winner that has become 23% of the satellite is a risk decision you never made. Trim it back to the cap. This is the one sale where the price rising is legitimately part of the reason — not because it went up, but because the resulting weight breaches a rule you set in advance. The same applies when your life changes: a goal moves closer, income changes, and the equity share itself needs to come down.

Three: you have a clearly better use for the money. A genuinely superior opportunity, or the core needing funding after drift. Keep the bar high, because this reason is easily abused — it is the respectable disguise worn by chasing whatever has recently risen. If you cannot state, in a sentence, why the new use is better on the evidence rather than more exciting, it is not reason three.

And the reasons that feel legitimate but are not: it has gone up a lot and you want to book the profit; it has gone down a lot and you want the pain to stop; a headline frightened you; someone on a screen said to; you are bored; you need to fund a purchase you never planned for. Each of these is the purchase price or an emotion doing the deciding. The test from the previous article settles all of them — would you buy this today, at today’s price, knowing what you now know?

The Annual Review

One honest hour a year

A portfolio needs a routine, and it is smaller than people expect. Quarterly, read the results of what you own and note anything that moves against your thesis; do not touch weights. Once a year, sit down properly and run six checks.

Is every thesis sentence still true? Has any holding, sector or shared thesis breached its cap? Has the core-satellite split drifted outside its band? What did costs and taxes actually amount to this year? Which mistakes recurred from last year’s review — the same list as last time is itself the finding. And the one that matters most: what has the satellite actually returned, all-in, against what the same money would have done in a broad index fund?

That last calculation must include the positions you sold, the dividends, the costs and the taxes, and it must be measured against a fair benchmark — a small-company index for a portfolio of small companies, not a large-cap index that flatters you. Our CAGR calculator will do the arithmetic on both figures. Three to five years of honest trailing is an answer, and the correct response to that answer is to shrink the satellite rather than to try harder. As the index versus picking article put it, most people never run this comparison at all, and not running it is also an answer.

Key Takeaways

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Frequently Asked Questions

Your questions answered

How many stocks should a beginner own?

Fewer than most people expect at the start, then growing towards eight to fifteen. A beginner with a small satellite is better served by three or four companies they have genuinely researched than by twelve they have skimmed, because the binding constraint early on is attention, not diversification — and the index core is already providing the diversification anyway. Add positions as your capacity to follow them grows, and make room by removing something rather than by simply extending the list. If you cannot say what each holding does and what would make you sell it, you already own too many.

Should I put more money into my best idea?

Modestly, and only when “best” means the evidence is stronger rather than the story is better. A tilt of one and a half to two times your base weight, still inside the per-position cap, is a reasonable expression of a stronger case. Beyond that you are betting the portfolio on your ability to rank your own ideas, which is precisely the skill the data says most individuals do not have — and, importantly, conviction tends to be highest right when a holding has already run, which is when the tilt is most dangerous. Concentration builds fortunes and destroys them; it belongs to people who can survive being wrong about their best idea.

How often should I rebalance my portfolio?

Check once or twice a year, act only when something is outside its band. Rebalancing more often adds costs and taxes without adding much control, and rebalancing never lets the portfolio drift into a risk level you did not choose. Route new contributions to whatever is underweight and you will find most years require no selling at all. One warning: rebalancing is a risk-control tool, not a return-enhancing one. In a long rising market it will usually cost you something, and that is the price of not being unknowingly overexposed when the market stops rising.

My winner is now 30% of my portfolio. Trim it or let it run?

This is the one place where thoughtful investors genuinely disagree, so here is both cases. Letting it run: long-term wealth is usually built by a small number of holdings becoming very large, and trimming winners repeatedly is how people cap their best outcomes — the tax bill on each trim is real and permanent, too. Trimming: a 30% position means roughly a third of your money now depends on one management team, one industry and one set of accounts being sound, and if it halves the portfolio takes a 15% hit from a single company. A middle path many use is to trim back to the cap only when the position exceeds it by a wide margin, do it gradually across financial years, and never let a single holding exceed the level at which its collapse would derail your plan. What matters most is that you decide the rule before you are in this position, not while looking at the gain.

Can I skip the index core and just hold direct shares?

You can, and plenty do. Understand what you are choosing: without a core, your entire equity outcome depends on your selection, your temperament and your available time over decades, with no fallback if any of the three falls short — and the evidence on how professionals fare at that task is in the index versus picking article. The core exists so that being an ordinary stock picker, which is what most people turn out to be, is not financially expensive. If you skip it, the annual comparison against a broad index becomes essential rather than merely useful, because it is the only thing that will tell you honestly how the choice is going.

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