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Speculative Bubble

Explore the history of financial speculation, the concepts behind market bubbles, and major historical episodes.

By @darkoUpdated Aug 19, 2026

Keystone concepts

Speculative bubbleKeystone
Connects 12 concepts
An economic bubble is a period when current asset prices greatly exceed their intrinsic valuation, being the valuation that the underlying long-term fundamentals justify.
Futures contractKeystone
Connects 14 concepts
In finance, a futures contract is a standardized legal contract to buy or sell something at a predetermined price for delivery at a specified time in the future, between parties not yet known to each other.
SpeculationKeystone
Connects 17 concepts
In finance, speculation is the purchase of an asset with the hope that that asset will become more valuable in a brief amount of time.

Articles

The Anatomy of Mania: Tulips, Viruses, and the Birth of Financial Speculation
How a botanical curiosity and a viral infection converged to create the world's first recorded speculative bubble.

Challenges

Anatomy of a Speculative Bubble
5 questions · 3 plays

Relationships around keystone concepts

Forward curve — related to → Futures contract: standardized version of forward contracts
Speculation — related to → Information cascade: social mechanism triggering speculative herd behavior
Speculation — related to → Behavioural finance: field studying the cognitive biases behind speculative decisions
Speculation — related to → Irrational exuberance: psychological state fueling speculative market bubbles
Speculation — related to → Charles P. Kindleberger: historian who documented the cyclical nature of speculation
Speculation — related to → Margin (finance): mechanism enabling high-risk speculative leverage
Speculation — related to → Greater fool theory: psychological driver of speculative asset bubbles
Speculation — related to → Efficient-market hypothesis: theoretical framework challenging the premise of profitable speculation

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Herd behavior

Also known as: herding · swarm behaviour in quadrupeds

Community · Herd behavior

Connections14

cognitive bias fueling herd behavior
The bandwagon effect is a cognitive bias where the probability of an individual adopting a belief or behavior increases as more people adopt it, reinforcing herd dynamics.
SourcesWikipedia Wikidata Wikipedia Wikidata
mathematical model of herd behavior
An information cascade occurs when individuals make decisions based on the observations of others rather than their own private information, leading to a collective herd-like state.
SourcesWikipedia Wikidata Wikipedia Wikidata
psychological mechanism driving herd behavior
Social proof is a psychological phenomenon where individuals mirror the actions of others in an attempt to reflect correct behavior in a given situation, serving as a primary driver for herd behavior.
SourcesWikipedia Wikidata Wikipedia Wikidata
market outcome of herd behavior
A speculative bubble is a period of rapid asset price inflation followed by a crash, fundamentally driven by the collective herd behavior of market participants.
SourcesWikipedia Wikidata Wikipedia Wikidata
academic field studying herd behavior
Behavioural finance incorporates psychological insights to explain market anomalies like herd behavior, challenging the assumption of perfectly rational actors.
SourcesWikipedia Wikidata Wikipedia Wikidata
financial event caused by algorithmic herd behavior
A flash crash is a rapid, deep, and volatile drop in security prices occurring within a very short time period, often triggered by automated trading algorithms mimicking herd behavior.
SourcesWikipedia Wikidata Wikipedia Wikidata
extreme manifestation of herd behavior
Mob mentality describes the loss of individual self-awareness and the adoption of group-driven, often impulsive or violent, behaviors in large crowds.
SourcesWikipedia Wikidata Wikipedia Wikidata
pioneer of conformity research
Solomon Asch conducted seminal experiments on conformity that demonstrated how individuals will ignore their own perceptions to align with a group, providing empirical evidence for the mechanics of herd behavior.
SourcesWikipedia Wikidata Wikipedia Wikidata
consequence of herd behavior in decision-making
Groupthink occurs when the desire for harmony or conformity in a group results in an irrational or dysfunctional decision-making outcome, often exacerbated by herd behavior.
SourcesWikipedia Wikidata Wikipedia Wikidata
theoretical counterpoint to herd behavior
The efficient-market hypothesis posits that asset prices reflect all available information, standing in direct opposition to the irrational, herd-driven market movements observed in reality.
SourcesWikipedia Wikidata Wikipedia Wikidata
rationalization for herd-driven speculation
The greater fool theory explains why investors participate in bubbles despite high prices, relying on the belief that they can sell to a 'greater fool' later, a behavior fueled by herd mentality.
SourcesWikipedia Wikidata Wikipedia Wikidata
related social phenomenon of inaction
The bystander effect is a social psychological theory where individuals are less likely to offer help to a victim when other people are present, illustrating how group presence influences individual behavior.
SourcesWikipedia Wikidata Wikipedia Wikidata
driver of volatility in futures markets
When market participants follow the actions of others, it can lead to rapid, non-fundamental price swings in futures contracts, increasing market instability.
SourcesWikipedia Wikidata Wikipedia Wikidata
Psychological mechanism driving irrational exuberance
Herding describes the tendency of investors to follow the actions of a larger group, which fuels the unsustainable price increases characteristic of irrational exuberance.
SourcesWikipedia Wikidata Wikipedia Wikidata

Summary

Herd behavior is the behavior of individuals in a group acting collectively without centralized direction.

15 words

SourcesWikipedia

Facts