Ask any consistently profitable trader what the single most important rule in their playbook is, and almost all of them will say some version of: never risk more than 2% of your capital on any single trade. It isn't glamorous advice. It also happens to be the difference between traders who are still in the game five years from now and those who aren't.

Why 2%?

The 2% rule is mathematically protective. If you lose 10 consecutive trades — an unlikely but entirely possible streak — you've only lost about 18.3% of your account, not 20%, because each loss compounds on the remaining (shrinking) capital. From 81.7% of your account, recovery is realistic. This is the difference between a bad month and a blown account.

A trader risking 10% per trade who hits five consecutive losses has lost 41% of their account and now needs a 70% return just to break even. The 2% trader in the same scenario has lost under 10% — and needs roughly an 11% return to recover. Same losing streak, completely different outcome.

How to Calculate Position Size

Position Size = (Account Size × Risk %) ÷ (Entry Price − Stop Loss Price). If your account is ₹5,00,000 and you risk 2%, that's ₹10,000 of risk capital. If your entry is ₹500 and your stop is ₹490, your risk per share is ₹10. Position size = ₹10,000 ÷ ₹10 = 1,000 shares. Every trade, every time — no exceptions, no "just this once."

Why Traders Ignore It Anyway

FOMO. When a setup "feels" perfect, traders double or triple their normal size — and this is exactly the moment the market tends to punish hardest, because conviction and position sizing should never be correlated. The CFA Risk Framework removes the emotional decision entirely: position size is calculated mechanically before entry, and it never changes based on how confident you feel.

We cover position sizing in granular detail in the Edge + Precision Bundle. Book a Discovery Call to find the right course for your level.