The key ideas

Fooled by Randomness: The Hidden Role of Chance in Life and in the Markets

Nassim Nicholas Taleb, 2001

Why is the neighbour who earns more not necessarily smarter? Nassim Nicholas Taleb, a former trader, shows how we mistake luck for talent and random noise for meaning. You will learn how to judge success together with the outcomes that never happened, why checking your results often does you harm, and why the size of a win matters more than how often it comes.

Who it is for

For anyone who invests money, takes risks at work, or simply compares themselves with friends who seem more successful. And for anyone who wants to tell their own merit apart from luck.

Mild success can be explainable by skills and labor. Wild success is attributable to variance.

Croesus on the pyre calls out to Solon

Croesus, king of Lydia, was thought to be the richest man of his time. One day he welcomed the Athenian sage Solon and expected his guest to call him the happiest of men. Solon replied that no one can be called happy until their life has been lived to the end. The king thought this was foolish. Years passed. Croesus lost a war to the Persian king Cyrus and was led to the pyre. Standing before the flames, he cried out: “Solon, you were right!” Cyrus asked what the words meant, listened to the story, thought about his own fate and spared his prisoner.

This legend runs through Nassim Nicholas Taleb's first book. For many years he traded on financial markets, and he watched luck arrive and leave just as suddenly as it came to Croesus and left him. “Fooled by Randomness” came out in 2001, before “The Black Swan” and “Antifragile”. It is not a book about great upheavals. It is about how, every single day, we mistake luck for talent and noise for meaning.

Taleb's main idea is simple and uncomfortable. What luck gave you, luck can take away, and quickly. We are bad at telling the earned from the accidental, because we see only the history that happened and not the ones that could have happened.

Ahead are two traders living next door to each other, ten million dollars for one pull of a trigger, monkeys at typewriters, a man in front of a screen of stock quotes, and pigeons in a box. At the end you will see Taleb himself admit that randomness fools him as much as anyone, and you will learn what he does about it.

The neighbour who earned more

Taleb invents two traders and makes them neighbours. Nero Tulip has a doctorate in statistics. He is well read and careful. He trades so that he never gets knocked out of the game, and so he earns well, but without sparkle. His neighbour John specialises in high-yield bonds. He has no scientific training, yet his house is bigger, his car more expensive and his income far higher.

For years Nero feels like a failure next to John. The comparison seems fair: both work in the same market, one has more money, so he must be better at the job. Then, in the summer of 1998, the market turns sharply, and within a few weeks John loses almost everything he has made. Nero stays right where he was.

For people like John, Taleb coins the term “lucky fool”. This is someone who won thanks to luck but sincerely credits his success to skill. While luck is on his side, you cannot tell him apart from a smart man. His numbers even look better than his careful neighbour's.

The mistake is that we compare people by the final sum. The sum says nothing about how it was made. Why John won for so long and lost so fast will become clear two chapters from now.

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About the author

Nassim Nicholas Taleb is a Lebanese-born American writer and scholar of uncertainty who spent many years as a trader. He is the author of “The Black Swan” and “Antifragile”.

All books by this author: Nassim Nicholas Taleb

Terms from the book

  • John
  • Bonds
  • Janet
  • Skinner
  • Cyrus
  • Odysseus
  • Yale
  • Harvard
  • Antony
  • Homer
  • Asymmetry
  • Trader
  • Soros
  • Futures
  • Survivorship bias
  • Stoicism
  • Croesus: King of Lydia in the sixth century BC. His name became a byword for vast wealth.
  • Solon: Athenian lawgiver and sage of the sixth century BC. According to legend, he told Croesus that a person's happiness can only be judged by the end of their life.
  • Nero: Nero Tulip, a fictional character in the book: a cautious trader with a doctorate in statistics.
  • Russian roulette: A deadly game: one bullet goes into a revolver, the cylinder is spun, the gun is held to the head and the trigger is pulled.
  • Alternative histories: An idea from the book: the ways events could have turned out but did not. Taleb suggests judging any result together with them.
  • Iliad: Homer's poem about the Trojan War, one of the oldest works of European literature.
  • Denominator: The bottom part of a fraction. For Taleb it is an image: the total number of people who tried, not only those who succeeded.
  • Marc: A fictional character in the book, a highly paid New York lawyer who feels like a failure among his rich neighbours.
  • Park Avenue: A street in Manhattan, New York, known for its expensive apartment buildings.
  • The Millionaire Next Door: A 1996 book by Thomas Stanley and William Danko about how American millionaires live and save.
  • Quotes: The current prices of securities, currencies or commodities on an exchange.
  • Signal: Here: the part of the information that really tells you how things stand.
  • Noise: Here: random swings and reports that say nothing about how things stand but look important.
  • Stock index: A number that shows how the prices of a group of large companies on an exchange change on average.
  • Bull: In market slang, someone who expects prices to rise.
  • Bear: In market slang, someone who expects prices to fall.
  • Sirens: In Greek myth, creatures whose singing lured sailors to their death.
  • Bacchus: The Roman name of Dionysus, god of wine and revelry. According to legend, he was the one who abandoned Antony before his defeat.
  • Cavafy: Constantine Cavafy (1863 to 1933), a Greek poet who lived in Alexandria.

All terms

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