TL;DR: Paul Tudor Jones' 1% Risk Rule states you never risk more than 1% of your total account on any single trade. Position size is calculated from your stop distance: risk amount ÷ stop distance = shares to buy. The rule protects capital during losing streaks and removes fear from trading because the worst-case loss is always known in advance.
Paul Tudor Jones' 1% Rule is simple: on any trade, risk only 1% of your total account. If you have $100,000, you can only lose $1,000 on a single position. This forces tight stop losses and proper position sizing. During Black Monday 1987, while others were wiped out, Jones was positioned short and made $100 million because his risk management kept him alive to profit from the crash. The rule ensures you can survive 10+ consecutive losses without significant account damage.
Core principles
- 1. Calculate 1% of your total account before every trade
- 2. Set stop loss distance based on 1% risk limit
- 3. Adjust position size to respect the 1% rule
- 4. Never average down on losing positions
- 01 Calculate your 1% risk amount
- 02 Set stop loss based on technical levels
- 03 Size position so stop loss = 1% of account
- 04 Never enter without defined stop loss
- 01 Hit stop loss (automatic exit at 1% loss)
- 02 Hit profit target (typically 2-3x risk)
- 03 Market structure breaks against you
Risks to respect
- 1% risk per trade (non-negotiable)
- Maximum 5 correlated positions at once
- Cut losses quickly, let winners run
- Review all trades weekly for pattern recognition
Risk management
- 1% risk per trade (non-negotiable)
- Maximum 5 correlated positions at once
- Cut losses quickly, let winners run
- Review all trades weekly for pattern recognition
Step-by- step plan
- 1
Calculate Your 1% Risk Amount Daily
Before any trading session, calculate exactly what 1% of your current account balance is. This number changes as your account grows or shrinks. Write it down or enter it into your position sizing calculator. This is your maximum dollar loss per trade for the day—treat it as an absolute ceiling.
- 2
Identify Your Stop Loss BEFORE Entry
Before entering any trade, determine your stop loss level based on technical analysis—not on how much you want to risk. Place stops below support levels, below moving averages, or below the entry candle's low. The stop should be at a level where your trade thesis is proven wrong, not an arbitrary percentage.
- 3
Calculate Position Size Using the Formula
Apply the position sizing formula: Position Size = Risk Amount ÷ Stop Distance. If your 1% risk is $500 and your stop is $2 below entry, buy 250 shares maximum. If the stop distance requires a position smaller than your minimum viable size, the trade isn't appropriate for your account size.
- 4
Set Hard Stop Loss Orders Immediately
The moment you enter a trade, place your stop loss order. Not a mental stop—an actual order in the market. Mental stops get ignored when emotions run high. A hard stop loss ensures you exit automatically even if you're away from your screen or frozen by fear during a rapid move.
- 5
Review Weekly and Adjust for Drawdowns
At the end of each week, review all trades. Calculate your win rate, average win, and average loss. If you're in a drawdown (losing streak), consider reducing risk to 0.5% per trade until confidence returns. During strong performance, resist the temptation to increase beyond 1%—the rule exists to protect you when luck turns.
In detail
Paul Tudor Jones: The Trader Who Made $100 Million on Black Monday
October 19, 1987—Black Monday. The stock market crashed 22% in a single day, the largest one-day percentage decline in history. Billions evaporated. Traders were wiped out. Firms went bankrupt. But Paul Tudor Jones walked into the chaos and walked out $100 million richer. How? Rigorous risk management. Jones had recognized the market's vulnerability through technical analysis and was positioned short. But more importantly, his 1% rule meant he'd survived dozens of losing trades in the months before, preserving capital for the big opportunity. Other traders had already blown up their accounts chasing losses. Jones later said: 'The most important rule of trading is to play great defense, not great offense.' His 1% rule wasn't about maximizing profits on any single trade—it was about ensuring he'd survive long enough to be present when the truly massive opportunities appeared. Risk management isn't glamorous, but it's what separates survivors from statistics.
The Mathematics of Survival: Why 1% Is the Magic Number
Why exactly 1%? The math is compelling. If you risk 1% per trade and hit 10 consecutive losing trades (unlikely but possible), you've lost only 9.6% of your account. Your capital remains largely intact. You can recover with a few good trades. Now consider risking 5% per trade. Ten losses drops your account by 40%. To recover, you need a 67% gain—much harder. At 10% risk per trade, ten losses leaves you with just 35% of your capital. You'd need a 186% gain just to break even. The math becomes nearly impossible. This asymmetry is why professional traders are obsessive about risk. A 50% loss requires a 100% gain to recover. A 90% loss requires a 900% gain. The 1% rule ensures you never dig a hole so deep that climbing out becomes mathematically improbable. It's not about winning every trade—it's about ensuring losses remain small enough to survive.
Position Sizing: The Formula That Protects Your Capital
The 1% rule translates directly into a position sizing formula. Here's how it works: Step 1: Calculate your 1% risk amount. If your account is $50,000, your maximum risk per trade is $500. Step 2: Identify your stop loss distance. If you're buying a stock at $100 and your technical stop is at $95, your stop distance is $5 per share. Step 3: Calculate position size. Divide risk amount by stop distance: $500 ÷ $5 = 100 shares. This is your maximum position. This formula adapts automatically. Wider stops mean smaller positions. Tighter stops allow larger positions. The constant is the dollar amount risked—always 1% of your account. You might own 50 shares of one volatile stock and 500 shares of a stable one, but both represent exactly the same dollar risk to your account.
Trading Psychology: Why Risking Less Actually Makes More
The 1% rule does something profound for trading psychology: it removes fear. When you know the absolute worst outcome of any trade is a 1% account loss, you can think clearly. You can let winners run without the anxiety of giving back gains. You can cut losses quickly without the shame of admitting defeat. Contrast this with traders risking 10% per trade. Every position becomes emotionally charged. Losses hurt so much that they hold losers hoping for recovery. Winners trigger such relief that they take profits too early. Fear and greed dominate every decision. Jones understood that emotional stability is a competitive advantage. By mechanically limiting risk, he freed his mind to focus on market analysis rather than portfolio anxiety. The 1% rule isn't just about money management—it's about creating the psychological conditions for rational decision-making in an inherently irrational environment.
Key takeaways
- Paul Tudor Jones made $100 million on Black Monday 1987 while others went bankrupt—his 1% rule kept him alive long enough to profit from the crash that wiped out overleveraged traders.
- The math of survival is unforgiving: 10 consecutive losses at 1% risk costs only 9.6% of capital, but 10 losses at 10% risk leaves you with just 35% and needing a 186% gain to recover.
- Position sizing formula: Risk Amount ÷ Stop Distance = Position Size. A $500 risk (1% of $50,000) with a $5 stop means maximum 100 shares—the formula automatically adjusts for volatility.
- The 1% rule removes fear from trading. When maximum loss is just 1%, you can think clearly, cut losses without shame, and let winners run without anxiety—emotional stability becomes your edge.
Frequently asked questions
Does the 1% rule work for small accounts of €5,000? +
Yes. With €5,000 your max risk per trade is €50. This forces tight stops and small positions — good discipline training. Watch that transaction costs don't eat too much: a €2-5 flat commission is relatively high against €50 risk at some brokers.
Can I risk 2% if I see a very strong setup? +
Paul Tudor Jones said explicitly: no. The point of the rule is that it is non-negotiable. Once you make exceptions, discipline erodes. 'Strong setup' thinking is exactly the emotional reasoning the rule is designed to block. Stick to 1% — the safety comes from consistency.
How much time per day does this strategy require? +
The position sizing calculation itself takes 2-5 minutes per trade. Actual execution depends on your trading style: from day trading (hours per day) to swing trading (15-30 minutes per day). The 1% rule is a risk framework that applies to any timeframe.
What if my stop is far away and 1% forces a tiny position? +
Then the market is telling you the trade doesn't fit your account size. Skip the trade or wait for an entry closer to your stop level. A tiny position is always better than breaking the rule. PTJ said: if the setup doesn't fit your risk rules, it's not a setup.
Historical context
PTJ made $100M on Black Monday 1987 while others lost everything
- Basic technical analysis
- Discipline and emotional control
- Position size calculator
- Charting platform
- Stop loss orders