DEFINITION of 'Bubble'

1. An economic cycle characterized by rapid expansion followed by a contraction.

2. A surge in equity prices, often more than warranted by the fundamentals and usually in a particular sector, followed by a drastic drop in prices as a massive selloff occurs.

3. A theory that security prices rise above their true value and will continue to do so until prices go into freefall and the bubble bursts.


Bubbles form in economies, securities, stock markets and business sectors because of a change in the way players conduct business. This can be a real change, as occurred in the bubble economy of Japan in the 1980s when banks were partially deregulated, or a paradigm shift, as happened during the dotcom boom in the late '90s and early 2000s. During the boom people bought tech stocks at high prices, believing they could sell them at a higher price until confidence was lost and a large market correction, or crash, occurs. Bubbles in equities markets and economies cause resources to be transferred to areas of rapid growth. At the end of a bubble, resources are moved again, causing prices to deflate. Thus, there is little long-term return on those assets.

  1. Dotcom Bubble

    An rapid rise in equity markets fueled by investments in internet-based ...
  2. Bubble Theory

    A school of thought that believes that the prices of assets can ...
  3. Correction

    A reverse movement, usually negative, of at least 10% in a stock, ...
  4. Contraction

    A phase of the business cycle in which the economy as a whole ...
  5. Crash

    A sudden and significant decline in the value of a market. A ...
  6. Sell-Off

    The rapid selling of securities, such as stocks, bonds and commodities. ...
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  1. What economic factors influence corporate bond yields?

    The most telling signs that a tech stock is about to burst are no different from the signs of impending collapse of stocks ... Read Full Answer >>
  2. What are some of the ways that economic growth can be achieved?

    Economic growth is measured by an increase in gross domestic product, or GDP, which is defined as the combined value of all ... Read Full Answer >>
  3. How do interest rates coordinate savings and investment in the economy?

    In modern economies, some individuals earn more money than they need to spend on present goods. There are other individuals ... Read Full Answer >>
  4. What do people mean when they say there is a "bubble" going on in the market, such ...

    A financial "bubble" refers to a situation where there is a relatively high level of trading activity on a particular asset ... Read Full Answer >>
  5. Where do penny stocks trade?

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  6. Where can I buy penny stocks?

    Some penny stocks, those using the definition of trading for less than $5 per share, are traded on regular exchanges such ... Read Full Answer >>

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