Most investors love stories.
“This company will dominate AI.”
“This startup is the next Amazon.”
“This stock can only go up.”
Sometimes those stories become true.
Most of the time, they do not.
The mistake investors often make is called base rate neglect — ignoring historical probabilities and focusing too much on exciting narratives.
What Is Base Rate Neglect?
Base rate neglect is a psychological bias where people ignore general statistics and focus on specific details.
In investing, this means:
- ignoring how similar businesses historically performed,
- while becoming overly optimistic about one particular company.
Investors often think:
“This company is different.”
But history usually says otherwise.
The “Next Amazon” Trap
Every market cycle creates a “next big thing.”
- Dot-com companies in the 1990s
- Crypto companies in 2021
- AI companies today
Many investors assume a fast-growing company will become the next giant success story.
But the base rate matters.
Historically:
- most startups fail,
- most high-growth companies slow down,
- and many exciting businesses never justify their valuation.
The probability of extreme success is actually very small.
A Great Industry Does Not Guarantee Great Returns
The internet changed the world.
But many internet stocks from the dot-com bubble collapsed.
Why?
Because investors ignored valuation and historical outcomes.
They believed:
“This industry will grow.”
That part was true.
But they forgot:
“Most companies in competitive industries struggle to maintain high returns.”
A great business trend does not automatically create a great investment.
Why Investors Ignore Base Rates
Stories are emotional and exciting.
Statistics are boring.
Humans naturally prefer:
- optimism,
- narratives,
- and recent success stories.
That is why speculative bubbles repeat throughout history.
People believe:
“This time is different.”
Usually, it is not.
How Smart Investors Think
Great investors study probabilities.
Warren Buffett often focuses on:
- long-term business economics,
- historical patterns,
- and realistic expectations.
Instead of asking:
“Can this stock become huge?”
A rational investor asks:
“What usually happens to businesses like this?”
That is base-rate thinking.
Final Thoughts
Base rate neglect causes investors to overpay for dreams.
The market rewards stories in the short term.
But over time, reality matters.
Successful investing is not about chasing exciting narratives.
It is about combining:
- probabilities,
- valuation,
- and rational thinking.
Because in investing, avoiding bad decisions is often more important than finding the perfect stock.
Happy Investing !