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Economic BubblesEconomic bubbles form when the market price of a group of assets persistently exceeds their real value, often in a specific sector such as housing or tech stocks.
These bubbles often begin during moments of excitement—about new technologies, fast-growing industries, or unusually cheap borrowing. As prices rise, more people purchase the assets, fearing they’ll miss out on future gains.
Bubbles burst when confidence is shaken, typically due to disappointing news, rising defaults, or a sudden realization that prices are no longer justified. When that shift happens, investors rush to sell their assets—prices can fall just as quickly as they climbed. The fallout can strain banks, wipe out household wealth, and sometimes even trigger broader economic downturns.
Bubbles tend to follow similar patterns. Whether it’s tulips in 1630s Netherlands, regarded as the first financial bubble, or early internet companies in the 1990s, they all generally move through similar phases: early enthusiasm, rapid price increases, broad public participation, and an abrupt collapse.Explore Economic Bubbles
What we've found
Herd behavior is one cause of economic bubblesA video breaks down the core forces behind economic bubbles, illustrating how forces including cheap credit, soaring optimism, and feedback loops push asset prices far beyond fundamentals—until a single shock triggers panic, selling and a rapid collapse. TED-EdJapan's 1990s deflation followed the country's fastest growth periodThe end of World War II ended Japan's isolation in the global economy, prompting what's now called the "Japanese Economic Miracle." From the 1940s to the 1980s, Japanese policy makers enacted ultra-loose monetary policies that pushed a ton of cash into the market and fueled rapid growth. But these policies ultimately helped create a bubble and sent the country into a deep period of deflation. Patrick Boyle'Good deflation' happens when prices naturally track with supply, meaning prices change graduallyThis tends to make products and services more affordable and normalizes the standard of living. Bad deflation usually happens when there are sudden changes to either supply or demand.
Near-zero [interest rates helped create the real estate bubble that sparked the Great Recession when it crashed](https://www.youtube.com/watch?v=LMo9mD8j7IA&t=91s)
Because deflation distorts the value of money, deflation is particularly harmful for borrowers. Low interest rates made it easy for businesses and everyday people to take on enormous debt, which exacerbated the effects of the recession. Foundation for Economic Education'Planet Money' debates the financial indicators that defined 2025In this end-of-year episode, "Planet Money" stages a playful debate over which economic indicators best captured the chaos of 2025—from tariffs to AI bubbles—and which signals may matter most as the US economy heads into 2026. Planet MoneyEuphoric narratives are just one indicator of an economic bubbleA conversation with investor Jeremy Grantham outlines the indicators he watches for bubbles, including extreme valuations. He then compares those signals to today’s AI boom, arguing it shows several early signs of classic speculative excess. MorningstarAI investment may be the next major economic bubbleA video examines the massive surge in AI spending—forecast to hit $500B by 2026—and how this may be propping up a fragile US economy. Experts warn that if AI investment slows or under-delivers, the consequences could be felt in markets, jobs and growth. CNBCThe lifecycle of a financial bubble often follows a predictable patternEconomist Hyman Minsky originated what became a five-stage model of an economic bubble: a new “displacement,” a rapid boom, euphoric speculation, early profit-taking by insiders, and finally panic selling. From Japan’s 1980s real-estate surge to the 2008 crash, the pattern repeats across eras and assets. InvestopediaA rush to invest in British rail in the 1840s led to investor ruinDuring “Railway Mania,” speculative excitement pushed British rail shares to extreme valuations as investors chased rapid expansion. When costs ballooned and profits failed to materialize, the bubble collapsed in 1847—wiping out fortunes across the country. Focus EconomicsIn 2025, American tech companies will spend $300B to $400B on AIThat is, in nominal dollars, more than any group of companies has ever spent to do anything. Notably, these companies are not remotely close to earning $400B on artificial intelligence. SpotifyIn the aftermath of the 2008 financial crisis, the Fed began a program of quantitative easingThis program injected trillions of dollars of new money into financial markets to stimulate the economy. The move catalyzed an 11-year bull run and was repeated during the pandemic. Experts argue such power could worsen wealth inequality and contribute to bubbles in housing and finance. Frontline PBS
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