10/06/2026
The Nasdaq buyers of 1995 were right. The internet was real, the opportunity was real, and the returns were extraordinary. The buyers of 2000 were following the same logic — six years and 400% later.
That's the mechanism. The crowd is not wrong at the beginning. It is wrong at the end. And the end looks exactly like the middle.
Kahneman's research identifies three cognitive biases that make herding in markets almost inevitable: social proof (if everyone is buying, it must be right), the availability heuristic (recent gains dominate your model of the future), and regret aversion (missing a rally feels worse than participating in a loss).
The more intelligent you are, the better you become at constructing a rigorous justification for what the crowd is already doing. IQ does not protect against herding. It makes the rationalisation more convincing.
The antidote is not willpower. It is a written valuation estimate — done before the asset becomes a consensus trade, and held against the narrative's pressure to revise it.