The most boring pages of every trading book are the basics chapters — and simultaneously the most important. Everyone wants to jump straight to chart patterns, options spreads, to what seems sexy. When it comes to risk management, position sizing and asset allocation, most people think: "That's trivial, I'll skip it."
The problem: Those who trade without understanding these fundamentals don't fail because of their strategy. They fail because of mathematics they ignored. And often spectacularly — even if they're a genius, a billionaire, or a Nobel Prize winner.
Three true stories about men who should have known better:
"I can calculate the motion of heavenly bodies, but not the madness of people."
How the smartest man of his era bought the same stock twice — and ruined himself.
In spring 1720, Isaac Newton held shares in the South Sea Company. At the time he was not only Europe's most famous scientist but also Master of the Mint — head of the British Mint, and a professional in financial matters. The South Sea Company's stock rose from £128 to £300. Newton sold, pocketing a tidy profit of around £7,000. A good decision.
Then something happened that Newton hadn't factored in: the stock kept climbing. To £400. To £700. To £1,000. In London's coffeehouses, people talked of nothing else. Newton's friends, acquaintances, even his servants were making money — only he wasn't. He watched as the masses he'd long despised grew rich overnight.
In June 1720, Newton bought back in. At the peak price. And bought more when the stock dipped briefly. He was, after all, no fool — he knew the South Sea Company held a lucrative monopoly. Then, between August and September 1720, the stock collapsed. From £1,000 to £100. In six weeks.
Newton lost around £20,000. In today's purchasing power, roughly £3 million. For the rest of his life, he forbade anyone from uttering the words "South Sea" in his presence.
The Two Texans Who Wanted to Own the Silver Market
A lesson in margin, leverage, and what happens when you become too successful.
Bunker and Herbert Hunt were the sons of H. L. Hunt, one of the richest men in America — oil, real estate, everything. In 1973, Bunker had an idea: US inflation was spiralling out of control, confidence in the dollar was crumbling. What had historically always held its value? Silver.
The brothers began to buy. Not a few bars — they bought everything they could get their hands on. Physical silver was flown to Europe and Switzerland. Futures contracts were held to delivery rather than rolled. Allies were brought in — Saudi sheikhs, friends. They leveraged everything possible. By 1980 they controlled around one third of the world's silver supply that wasn't held by governments. Silver stood at $50 per ounce — it had been $6 at the start of their buying.
Then two things happened. First: the COMEX, the futures exchange, abruptly changed the rules. "Only liquidating orders permitted." Translated: nobody could buy silver any more, only sell. Second: the Fed raised interest rates so high that the financing costs on the Hunts' positions became unbearable.
On 27 March 1980 — Silver Thursday — silver fell from $21 to $10.80 in a single day. The Hunt brothers' margin calls were so massive that they had no money left to meet them. Had the US government not intervened with an emergency loan, the Hunts' collapse could have taken the entire financial system down with it. In the end they lost more than $1.7 billion. In 1988 the family filed for personal bankruptcy.
How to Destroy $20 Billion in One Week
The fastest capital destruction in modern hedge fund history.
By March 2021, Bill Hwang had made it. From an initial $200 million, he had built roughly $20 billion at Archegos Capital, his "family office". He was Wall Street's most unknown billionaire. The media barely knew him. He donated generously to Christian foundations, lived modestly, and spoke in interviews about his faith.
What nobody knew: the $20 billion weren't really $20 billion. Hwang had been working through Total Return Swaps (TRS) with major investment banks — a derivative that let him bet on stocks without holding them directly. The advantage for him: the position appeared in no public registry. The advantage for the banks: fat fees. The price: extreme leverage.
Credit Suisse, Morgan Stanley, Goldman Sachs, Nomura, UBS — each bank thought it was Archegos's sole prime broker. Each extended Hwang credit lines based on what they saw on their own books. Nobody knew he had built up positions with a total notional value of around $100 billion — concentrated in just a handful of stocks like ViacomCBS and Discovery.
On 22 March 2021, ViacomCBS announced a capital increase. The stock fell. The first margin call wave arrived. Hwang couldn't pay. The banks tried to talk. Hwang stopped responding. So the banks began selling his positions — each for itself, each as fast as possible, because each wanted to be out first. The result was the largest single-stock losses of a trading day in history: ViacomCBS lost 50% in two days. Discovery likewise.
Archegos was gone within a week. Credit Suisse lost $5.5 billion. Nomura $3 billion. Morgan Stanley and Goldman got out faster and escaped more cheaply. Hwang was sentenced in 2024 to 18 years in prison for fraud.
What you learn in this chapter are not academic formulas. They are the pillars that prevent your own portfolio from following in Newton's, the Hunts', or Hwang's footsteps. Order types. Spreads. Slippage. Position sizing. This is not introductory material you can check off and move on — it's the part you return to for the rest of your trading life.
🗺️ The Map of This Chapter
Two halves, fourteen sections. The first half is the scaffolding of the exchange itself — venues, order book, participants, clearing, regulation. The second half is the toolkit in your hand — from stocks to crypto, from REITs to structured products.