Investment Principles from the Greatest Investors

📌📖 George Soros

Reflexivity Theory

Markets are not efficient; they are reflexive. Participant perceptions and market fundamentals influence each other in a...

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🎯📖 Jim Simons

Data-Driven Decisions

We search for patterns in data that are predictive of future prices. The patterns have to be statistically significant a...

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🏦📖 David Swensen

Asset Allocation Primacy

Asset allocation is the most important investment decision. How you divide your portfolio among stocks, bonds, and alter...

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📌📖 Duan Yongping

Do the Right Things

The most important thing is to do the right thing, then do things right. Many people focus on efficiency while doing the...

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🔄📖 William Gann

Time Cycles

Time is the most important factor in trading. Markets move in cycles, and understanding these time cycles allows you to ...

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📌📖 Julian Robertson

Best vs. Worst Strategy

Go long the best companies in an industry and short the worst. This hedged approach reduces market risk while profiting ...

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🤝📖 Carl Icahn

Shareholder Activism

If a company is undervalued due to poor management, take a stake large enough to influence change.

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🛡️📖 Paul Tudor Jones

Defense First

Dont focus on making money; focus on protecting what you have. Playing great defense means youll be around to play offen...

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📖📖 Jesse Livermore

Read the Tape

The tape tells the story. Price and volume reveal what big money is doing. Learn to read market action.

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🎯📖 Bill Ackman

Concentrated Bets

Make a few big, well-researched bets rather than many small ones. Concentration builds conviction and focus.

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📌📖 Joel Greenblatt

The Magic Formula

Buy good companies at bargain prices. Rank by earnings yield and return on capital, then buy the top ranked.

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📌📖 Jeremy Grantham

Mean Reversion

Asset class returns revert to the mean. High valuations predict low future returns; low valuations predict high returns.

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💼📖 John Neff

Low P/E Investing

Buy stocks with low P/E ratios relative to their growth rates. The market often overreacts to bad news.

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📖📖 Li Lu

Deep Research

Understand the business deeply before investing. Read everything available. Talk to customers and competitors.

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🔄📖 Jim Rogers

Commodities Cycles

Commodities move in long cycles. Buy when nobody wants them; sell when everyone does.

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🧠📖 Stanley Druckenmiller

Home Run Mentality

When you have conviction, bet big. The way to make superior returns is through concentration, not diversification.

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📌📖 George Soros

Find the Flaw

The prevailing wisdom is always wrong. Find the flaw in the prevailing bias and bet against it when conditions change. T...

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📌📖 Jim Simons

Hire the Smartest People

Good science requires good scientists. We hire PhDs in mathematics, physics, and computer science—not Wall Street trader...

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📌📖 David Swensen

Equity Bias

Over the long term, equities have outperformed bonds and cash. A well-diversified portfolio should maintain a significan...

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💡📖 Duan Yongping

Understand the Business Moat

Only invest in businesses you truly understand and that have sustainable competitive advantages. If you can't explain th...

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💰📖 William Gann

Price and Time Square

When price and time are squared, a change in trend is imminent. This mathematical relationship between price movement an...

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📖📖 Julian Robertson

Deep Fundamental Research

Know more about the company than anyone else on Wall Street. Talk to customers, suppliers, competitors, and former emplo...

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🏦📖 Carl Icahn

Find Hidden Assets

Look for companies trading below the value of their assets. Real estate, patents, subsidiaries are often underappreciate...

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💭📖 Paul Tudor Jones

Control Your Emotions

Every day I assume every position I have is wrong. This removes the ego from trading. Never fall in love with a position...

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🎯📖 Jesse Livermore

Be Patient

It was never my thinking that made big money, it was my sitting. The big money is made in the waiting.

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💎📖 Bill Ackman

Activist Value Creation

When you see value trapped by poor management, take action to unlock it. Be a catalyst for change.

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📌📖 Joel Greenblatt

Systematic Approach

Use a systematic, rules-based approach to remove emotion from investing. Stick to the system.

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📌📖 Jeremy Grantham

Identify Bubbles

Bubbles are identifiable before they burst. Watch for valuations 2+ standard deviations above historical norms.

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🎯📖 John Neff

Total Return Focus

Look at total return: earnings growth plus dividend yield. Both matter for wealth creation.

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📖 Li Lu

Circle of Competence

Stay within your circle of competence. Only invest in what you truly understand.

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Explore core insights from different masters across investment topics