Becoming a confident investor

Reading for India · about 5 min

What this cluster is for

The rest of this wiki teaches you what things are and how they work. This cluster is where that knowledge becomes a portfolio.

It is the graduation of the foundational track, and it is built around one finding that runs through every article in it:

The decision that kills a portfolio is almost never the stock choice. It is the size of the position, and the behaviour under stress.

That sentence is not motivational. It is the conclusion drawn from the named cases in these 8 articles. Long-Term Capital Management in 1998 had a Nobel laureate on the board and thousands of positions. Archegos in March 2021 held ordinary listed shares. Pershing Square's research on Valeant was extensive. None of them failed at analysis. All of them failed at size, or at what happened when the position moved against them.

So this cluster does not try to make you a better stock picker. It tries to make your mistakes survivable, which is worth considerably more.

By the end of these 8 lessons you will be able to:

Say in one sentence why you own each holding, and what would end it
Run a company from business to verdict in a fixed order, without deciding first
Measure how concentrated you actually are, against the index's own concentration
Work out, in numbers, what a 50% fall in your largest position would cost you
See what 2% a year of costs removes from 20 years of investing
Classify a loss correctly, so you apply the fix that matches it
Calculate what your portfolio has really returned, rather than what you believe
Write a sell rule that works on the day it is needed

Nothing here is a tip. Nothing names a stock to buy. Every article should still be useful in 2036, about a company that does not exist yet.

The reading order

The articles build. Read them in order the first time.

Deciding what you are doing

Value, growth and momentum: what kind of investor are you? — 5 rules for what a good stock is. Mixing them removes every exit condition you had.
Analysing a company, end to end — 7 steps in a fixed order. The order is the method.

Building the portfolio

Risk, return and diversification — diversification is measured in distinct exposures, not in the number of names.
Position sizing, and how many stocks to own — the most important number in investing, and the one nobody chooses on purpose.
The power of compounding — 2% a year of costs takes about 21% of a 20-year result and about 32% of a 30-year one.

Staying in the game

Investing, trading and gambling — the 3 look identical on a screen. Ask who pays you if you are right.
Building your investing plan — 9 lines, one page, dated. Written before it is needed, or it is not a plan.
The kill switch: market psychology and your own mind — every bias arrives at the same moment. The defence is procedural, not educational.

The checklist

Every article ends in something you do with your own portfolio, in about 5 minutes. Collected here they are one afternoon's work, and they are the most valuable thing in this cluster. Tick them off as you go.

The 8 actions

Write the one-sentence reason for every holding: I own this because \_\_\_, and I will sell it when \_\_\_. Tag each with V, G, M, I or X. (1)
On one holding you already own, compare cash from operations with net profit for 5 years, and write the business in 2 sentences. (2)
Count your holdings, work out the weight of your top 3, and compare it with the index's own top-10 weight. (3)
Take your largest holding's weight, halve it, and write down what that percentage loss costs you in years of average returns. (4)
Multiply your real monthly investment by 521, then by 411. The difference is 2% a year of costs over 20 years. (5)
Find your worst loss of the last 2 years and classify it: bad thesis, bad sizing, bad timing, or bad luck. (6)
Calculate your portfolio's XIRR, and compare it with the number you believed and with the index over the same period. (7)
Write and date the sell rule for one holding, naming an observable event. (8)

Before you buy anything, from now on

The 2-part sentence, written before the order is placed. (1)
Weight × 50% fall. Can you pay that? (4)
Position ÷ average daily volume. Over 20% is a commitment, not a position. (4)
What else do I own that falls on the same news? Add those weights first. (3, 4)
The sell condition, written and dated on the day you buy. (8)

At every scheduled review, 2 or 4 times a year

Re-read each holding's sentence. Is the "because" still true? (1)
Cash from operations against net profit, on the latest results. (2)
Trim anything that has grown past twice its intended weight. (4)
Recalculate the top-3 and largest-sector weights. (3)
Check every fund is the direct or low-cost version. (5)
Read the plan page. Change it only if your circumstances changed. (7)

The 4 sentences to have written down before you need them

What I do when the portfolio falls 30%. (7)
The maximum percentage in one company, and in one sector. (4)
The months of expenses in the emergency fund, and where it is held. (7)
The 3 legitimate reasons to sell: the reason broke, the size is wrong, the money has a better job. (8)

India and the United States, equally

Every article covers both markets at the same depth, and then says where the 2 differ and what that difference tells you.

Three divergences run through this cluster and are worth stating here.

The published evidence is different. SEBI has studied and published the outcomes of individual traders in the Indian equity futures and options segment, 3 times, with the period and sample stated: press release 2/2023 covering FY 2018-19 and FY 2021-22, press release 22/2024 covering FY22 to FY24, and press release 50/2026 covering FY25 and FY26. There is no exact United States equivalent. That means an Indian reader can check a claim about retail trading outcomes against a named document, and an American reader usually cannot.

The shape of retail participation is different. Indian retail activity is heavily weighted towards leveraged derivatives with short expiries. American retail activity is more weighted towards shares and funds bought automatically from salary. The same person, with the same temperament, produces different results in the 2 systems, because the default product carries a different amount of built-in risk.

Tax changes the optimal holding period differently. In India, listed equity sold within 12 months is taxed at 20%, and after 12 months at 12.5% with an annual exemption on the first ₹1.25 lakh of such gains. In the United States, gains inside a 401(k) or an Individual Retirement Account are not taxed as they occur at all, and in a taxable account the rate falls sharply after 1 year. The result is that the same strategy has a different net return in each country, and imported advice needs a subtraction before it is used.

The 3 numbers most people have never calculated

If you do nothing else in this cluster, do these.

Your top-3 concentration. The percentage of your money in your 3 largest holdings. (Article 3)
Your real return. The XIRR of your own portfolio, next to what you believed it was. (Article 7)
Your cost drag over 20 years. Your monthly amount × 521, minus your monthly amount × 411. (Article 5)

Each takes under 5 minutes. Together they usually change what somebody does more than a year of reading about companies.

A note on what this is not

These lessons are free and will stay free. They are the text version of the ideas in our video course, written for anybody who cannot spend money on learning right now.

They will not make you a professional analyst. They are not meant to. They are meant to remove the specific, repeated, documented ways that individual investors lose money, most of which have nothing to do with picking the wrong company.

The goal is the same one it has always been: fewer people in the 95%.