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You cannot control whether you are right. You can control exactly how much it costs to be wrong.

The sizing formula returns 2.1 shares. You cannot buy 2.1 shares, and the choice between two and three moves your risk on that trade by nearly half. Everything downstream of the sizing rule assumes a number the market does not sell.

Equal rupee positions carry unequal risk. Volatility-adjusted sizing makes every position contribute roughly the same amount, which is what you probably intended.

The same percentage feels entirely different at ₹5 lakh and ₹5 crore. Why people who traded well small often trade badly big, and how to grow into the size.

Position sizing protects you per trade. Correlation is what happens when every trade turns out to be the same trade on a bad day.

How to narrow 5,000 companies to a shortlist worth reading about, and how to write down why you are buying — before you buy.

Every holding carries a maintenance cost measured in hours a year. Count the hours you genuinely have, and the number of holdings decides itself.

The decisions taken in the weeks after a serious loss usually cost more than the loss itself. What to do first, what to avoid, and how to come back properly.

A losing streak makes people cautious, which is protective. A winning streak makes them certain, which is not — and nobody looks for the problem while it is working.

The best problem in investing, and a genuinely difficult one. Concentration created by success is different from concentration you chose.

Averaging down and adding to a winner are opposite decisions behind the same button. What a top-up changes, what it cannot change, and the size rule that settles both.

On a Sunday in April you finish an annual report and write one line: buy this, ₹20,000. You act on it on the fifteenth of the following month, at a price 19 per cent higher, without rereading anything — because the decision was already made. The conclusion survived the six weeks. Everything that produced it did not.