About Quote by Niall Ferguson
“What's so seductive about the efficient markets hypothesis is that it applies nine years out of ten. A lot of the time it works. But when it stops working, you blow up.”
About This Quote
Source Book: The Ascent of Money, Niall Ferguson, 2008
The efficient markets hypothesis works most of the time, but its occasional failures can cause severe crises.
In simple terms: It works often, but when it fails, damage is huge.
Key Takeaway
Beware overreliance on market efficiency.
Themes
economics
risk
finance
behavioral
policy
Mood
cautious
analytical
skeptical
Type
analytical
critical
financial
When to use this quote
- investment decisions
- regulatory policy
- risk management
- portfolio construction
- financial forecasting
Key Concepts
market efficiency
systemic risk
overconfidence
Questions to Reflect On
- How do you detect when markets are deviating from efficiency?
- What safeguards can mitigate blow‑up risks?
A Different Perspective
It ignores structural changes and irrational behavior that can dominate markets.
