A study of over 1,150 international soccer games found that a country's national stock market systematically drops by an average of 0.5% the day after its team is eliminated. This isolates investor sentiment from economic fundamentals, proving collective mood directly impacts market prices.
Highly intelligent individuals often overestimate their investing prowess due to the "curse of knowledge." Expertise in one domain doesn't translate to financial markets, and their intelligence enables motivated reasoning, allowing them to rationalize failures rather than learn from them.
An investment thesis can be correct about the final outcome but still fail. The path is not linear; random volatility (the "bridge") creates mismatches, like AI compute overcapacity, that trigger defaults and force liquidations long before the correct endpoint is reached.
Contrary to efficient market theory, two-thirds of a published trading strategy's abnormal returns often persist. This is because executing contrarian strategies is emotionally taxing, as most investors find it too difficult to bet against a popular trend even when data supports it.
Investor Julian Robertson of Tiger Global correctly identified the 2000 tech bubble but was forced to liquidate his fund just before it burst. This shows that even if you're right, a market bubble can inflate further and outlast your capital, making shorting it a perilous strategy.
Companies allowing CEOs personal use of the corporate jet underperform by 4% annually. This small "poker tell" is not about the cost of the jet, but what it signals about a culture of excess and a weak board that enables other forms of corporate malfeasance.
An individual investor's primary edge over professionals is a long runway, free from quarterly performance reviews and flighty client capital. This allows them to be truly contrarian, ignore short-term volatility, and wait for long-term gains, a luxury most fund managers don't have.
The "wisdom of crowds," where average guesses are accurate, breaks down in financial markets. Unlike guessing an ox's weight, investors become emotionally attached to powerful narratives (e.g., crypto, AI), causing them to make correlated, systematic errors that lead to bubbles.