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There’s a position sizing rule that gets repeated so often in trading circles that most people accept it as gospel: Never risk more than 1% per position.
But here’s what nobody talks about — following this rule religiously can make it nearly impossible to generate meaningful returns, especially if you’re working with a smaller account in today’s market environment.
Let me show you the math that changed how I think about position sizing entirely.
The Problem With Conservative Allocation
Imagine you’re managing a $100 million institutional portfolio and you allocate only 5% of it — that’s $5 million in active positions.
Now let’s say you absolutely crush it. You triple that allocation over the course of a year.
That’s a 300% return on your $5 million.
Sounds incredible, right? Except when you do the math on your total portfolio, you’ve only made a 15% return for the entire year.
This issue becomes even clearer when you scale the numbers down to a retail level. Whether you have $1 million or $100 million, if you’re allocating just a sliver of it — say 5% — and you knock it out of the park on that portion, the impact on the total portfolio is still limited.
Crushing a small allocation doesn’t create large overall returns, no matter how impressive the individual trade looks in isolation.
That’s the brutal reality of ultra-conservative allocation. Even when you execute perfectly, the total portfolio impact is minimal because you’ve got so little capital actually working for you.
And this is exactly why the standard 1% per-position maximum that most traditional advisers recommend doesn’t make sense for everyone — especially active traders with smaller accounts who need to generate real, compounding returns.
What Actually Works for Small Portfolios
Here’s where I break from conventional wisdom. On a smaller portfolio, I’m fully willing to go 5% or even 10% per position.
Most traditional advisers would consider that very high risk, and they’re not wrong — it is higher risk compared to buying and holding an index fund.
But in a market where stock-specific breadth and internal structural shifts are driving the action, risk has to be measured against opportunity.
If you’re blindly allocating 1% per position on a $50,000 account, you’re putting a mere $500 to work per trade. Even if you double that trade, you’ve made $500 on a $50,000 account.
You’d need to hit consecutive home runs just to move the needle.
The key is understanding that your allocation strategy must scale with your portfolio size and, crucially, the specific trading systems you are using.
You cannot trade a high-probability, systematic mechanical strategy using the same rigid rules meant for a directional equity fund.
We recently covered how to calculate acceptable position size based on actual system performance, win rates, expected drawdowns, and mathematical expectancy.
That framework helps you identify a position size that makes statistical sense for your account, rather than relying on arbitrary rules left over from the 1980s.
Most people confuse total portfolio allocation with per-position risk allocation, and that confusion leads them to leave massive amounts of potential returns on the table.
Bottom line: The 1% rule isn’t wrong — it’s just not universal.
Your position sizing needs to reflect your actual portfolio size, your system’s data-driven edge, and your ability to generate meaningful returns without taking reckless, unhedged risk.
Kane Shieh
Kane Shieh Trading
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*This is for informational and educational purposes only. There is inherent risk in trading, so trade at your own risk.
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