Archive · 19 Dec 2025
Nithin Kamath Warns on Position Sizing Risks
Nithin Kamath, the founder of Zerodha, shared an important lesson for traders.
He said that even if you're right about the market most of the time, you can still lose everything if you don't manage your position sizes correctly.
This means deciding how much money to put into each trade.
Kamath explained that one bad trade, if it's too big, can wipe out all your previous profits.
He talked about a famous trader, Tom Basso, who learned that you need to consider three things when deciding how much to invest in a trade: how much risk you're taking, how volatile the market is, and how much margin you're using.
By following these steps, traders can protect themselves from big losses and make better decisions.
The main point is that surviving in the market depends not just on being right, but also on how much you bet on each trade.
Nithin Kamath warns that poor position sizing can lead to catastrophic losses despite correct market predictions.
One oversized bad trade can erase months of profits.
Position sizing is a core pillar of risk management, not a technical detail.
Tom Basso's framework includes risk percentage, volatility filter, and margin considerations.
The framework helps reduce exposure during volatile periods and limits emotional decision-making.
- Who
- Nithin Kamath, Zerodha founder
- What
- Warning about position sizing risks in trading
- When
- Not specified
- Where
- LinkedIn post
- Why
- To educate retail traders on risk management
- Expert
- Nithin Kamath, Zerodha founder
- Risk Management
- Position sizing
- Key Insight
- One bad trade can erase months of profits
- Framework Components
- Risk percentage, volatility filter, margin considerations
- Market Wizards Reference
- Tom Basso, Larry Hite