# Legendary Traders

> Profiles of legendary traders and investors, from Jesse Livermore and George Soros to Jim Simons and the Turtles, and the principles their careers have in common.

Source: https://learn.tradelabsai.com/history/legendary-traders/  
Track: Market History · Level: Beginner · Updated: 2026-10-03  
Publisher: TradeLabs AI (https://tradelabsai.com). Education, not financial advice.  
Cite as: TradeLabs Learn, "Legendary Traders", https://learn.tradelabsai.com/history/legendary-traders/

The history of markets is full of remarkable traders whose results, methods and mistakes still shape how people trade. Some were discretionary speculators who read markets by feel; others were systematic pioneers who built rules and models. Their styles differ enormously, yet a few principles appear again and again: strict risk control, cutting losses, letting winners run and sizing positions according to conviction and risk. Studying them is valuable, as long as you remember that their stories are filtered by survivorship and that copying a famous name's trades is not the same as having their edge.

## Profiles

| Trader | Era | Known for |
|---|---|---|
| Jesse Livermore | Early 1900s | Speculation on stocks and commodities; profited shorting in 1907 and 1929; subject of "Reminiscences of a Stock Operator" |
| George Soros | 1970s onward | Global macro; the 1992 pound trade; theory of reflexivity |
| Stanley Druckenmiller | 1980s onward | Macro trading with Soros and at Duquesne; concentrated bets with strict risk management |
| Paul Tudor Jones | 1980s onward | Macro and futures; reportedly profited during the 1987 crash |
| Jim Simons | 1980s to 2010s | Mathematician who founded Renaissance Technologies; quantitative investing pioneer |
| Richard Dennis | 1970s and 1980s | Trend following futures trader; trained the "Turtles" |
| Ed Seykota | 1970s onward | Early systematic trend following |
| Warren Buffett | 1950s onward | Value investing, long term ownership through Berkshire Hathaway |
| Ray Dalio | 1975 onward | Founded Bridgewater; macro investing and risk parity ideas |

## Jesse Livermore

Livermore made and lost several fortunes. He became famous for shorting before the 1907 panic and again during the 1929 crash. Edwin Lefèvre's 1923 book "Reminiscences of a Stock Operator", a lightly fictionalised account of his career, remains one of the most recommended trading books. His story also carries a warning: despite his skill, he went bankrupt more than once, often after breaking his own rules. See [Best Trading Books](https://learn.tradelabsai.com/start-here/best-trading-books/).

## Jim Simons and Renaissance

Jim Simons, a former codebreaker and award winning mathematician, founded Renaissance Technologies in 1982. Its Medallion Fund, run mainly for employees, used statistical models to find short term patterns. According to Gregory Zuckerman's book "The Man Who Solved the Market", Medallion averaged returns of about 66% a year before fees from 1988 to 2018. Its success helped inspire the growth of quantitative investing. See [Quantitative Trading](https://learn.tradelabsai.com/strategies/quantitative-trading/).

## The Turtle experiment

In 1983, Richard Dennis and his partner William Eckhardt debated whether trading could be taught. Dennis recruited a group of novices, the "Turtles", taught them a rule based trend following system with strict position sizing based on volatility, and gave them money to trade. Several went on to successful careers, supporting the idea that disciplined rules can be learned. See [Trend Following](https://learn.tradelabsai.com/strategies/trend-following/) and [Donchian Channels](https://learn.tradelabsai.com/indicators/donchian-channels/).

**Example: Volatility based sizing in the Turtle style**
The Turtle rules sized each position so that one average daily move, measured by a volatility unit called N (similar to ATR), equalled 1% of account equity. With a $100,000 account and a futures contract whose N is $500 per contract, one unit would be $1,000 divided by $500, or 2 contracts. A more volatile market with N of $1,000 would get only 1 contract. This keeps risk consistent across markets and is a core lesson that outlasted the original system. See [Volatility and ATR-Based Sizing](https://learn.tradelabsai.com/risk/volatility-and-atr-based-sizing/) and [ATR (Average True Range)](https://learn.tradelabsai.com/indicators/atr/).

## Common principles

| Principle | Lesson |
|---|---|
| Cut losses quickly | [Stop Loss Strategies](https://learn.tradelabsai.com/risk/stop-loss-strategies/) |
| Let winners run | [Exit Mechanics](https://learn.tradelabsai.com/position-management/exit-mechanics/) |
| Size by risk, not by hope | [Position Sizing](https://learn.tradelabsai.com/risk/position-sizing/) |
| Preserve capital to stay in the game | [Risk of Ruin](https://learn.tradelabsai.com/risk/risk-of-ruin/) |
| Follow a process and review it | [Trading Journal](https://learn.tradelabsai.com/start-here/trading-journal/) |
| Stay humble and adapt | [Structural Breaks and Regime Changes](https://learn.tradelabsai.com/math/regime-changes/) |

## A healthy perspective

Famous traders are famous partly because they won. Many equally skilled people took similar risks and lost. Their market conditions, access to information and capital also differed from those of a retail trader today. Learn their principles, especially around risk, rather than chasing their returns. See [Survivorship and Selection Bias](https://learn.tradelabsai.com/research/survivorship-and-selection-bias/) and [Hindsight and Outcome Bias](https://learn.tradelabsai.com/psychology/hindsight-and-outcome-bias/).

## Frequently asked questions

### Who is the greatest trader of all time?

There is no agreed answer; names often mentioned include Jim Simons, George Soros, Stanley Druckenmiller, Paul Tudor Jones and Jesse Livermore, each with different styles.

### What was the Turtle trading experiment?

A 1983 experiment in which Richard Dennis taught novices a rule based trend following system to test whether trading could be taught.

### What do successful traders have in common?

Strict risk management, cutting losses, letting winners run, disciplined position sizing and willingness to adapt.

Next, draw the lessons together in [Lessons From Market Failures](https://learn.tradelabsai.com/history/lessons-from-market-failures/).

## Continue learning

- Next lesson: [Lessons From Market Failures](https://learn.tradelabsai.com/history/lessons-from-market-failures/)
- Previous lesson: [Famous Trades in History](https://learn.tradelabsai.com/history/famous-trades-in-history/)
- Related: [Famous Trades in History](https://learn.tradelabsai.com/history/famous-trades-in-history/): From Soros breaking the Bank of England to The Big Short and GameStop, explore famous trades in market history, how they worked and the lessons behind them.
- Related: [Best Trading Books](https://learn.tradelabsai.com/start-here/best-trading-books/): The trading books worth your time, grouped by topic: psychology, technical analysis, risk, options, market structure and quant trading, and who each suits.
- Related: [Trend Following](https://learn.tradelabsai.com/strategies/trend-following/): Trend following buys markets that are rising and sells those that are falling. Learn the rules, the evidence, typical results and why patience pays.
- Related: [Quantitative Trading](https://learn.tradelabsai.com/strategies/quantitative-trading/): Quantitative trading uses data, statistics and code to find and trade repeatable patterns. Learn how quant strategies are built, tested and run.
- Related: [Discipline](https://learn.tradelabsai.com/psychology/discipline/): Discipline means following your trading plan even when emotions push against it. Learn why it breaks down and practical systems that make it easier.