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👑 Legends of Investing · Lesson 9 of 13 · 9 min

George Soros — Reflexivity & The Pound

💷 They call him 'The Man Who Broke the Bank of England' — because he made over $1 billion in one trade doing exactly that. His big idea: markets aren't rational machines, they're crowds of people whose beliefs bend reality until it snaps.

💡 Key idea

Markets aren't always rational. Investor beliefs and prices feed back into each other.

🧠 Why it matters

Soros founded Quantum Fund and pioneered 'reflexivity' — the idea that what investors BELIEVE about prices actually MOVES prices, which then changes what they believe, in a feedback loop. He used this to predict and profit from huge market dislocations.

🌍 In the real world

📰 September 16, 1992 — 'Black Wednesday.' Soros bet $10 billion against the British pound, knowing the UK couldn't keep defending it. The Bank of England fought all day. By evening, they gave up and let the pound crash. Soros pocketed over $1 billion overnight and earned the nickname forever.

📌 Takeaways

  • Reflexivity: beliefs shape reality, then reality shapes beliefs
  • When you're right with high conviction, size up
  • Markets can be wildly irrational

✅ Test yourself

What's Soros's theory of 'reflexivity'?
  1. Markets are perfectly rational
  2. Investor beliefs shape prices, which then change beliefs in a feedback loop
  3. Stocks always go up
  4. Bonds are riskless

Answer: B · Investor beliefs shape prices, which then change beliefs in a feedback loop

Reflexivity rejects the idea that markets are coldly rational. Beliefs influence prices, which influence beliefs — feedback loop.

What's Soros most famous for?
  1. Founding Apple
  2. Shorting the British pound and making over $1 billion in 1992
  3. Inventing crypto
  4. Writing The Intelligent Investor

Answer: B · Shorting the British pound and making over $1 billion in 1992

The 1992 pound trade is one of the most famous in history. It demonstrated reflexivity in action.

What did Soros do with most of his fortune?
  1. Bought yachts
  2. Donated $32+ billion to philanthropy through Open Society Foundations
  3. Hid it offshore
  4. Bought every Picasso

Answer: B · Donated $32+ billion to philanthropy through Open Society Foundations

Soros has donated more than $32 billion to philanthropic causes, making him one of the largest philanthropists in history.

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