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A market for a security, commodity, currency, or anything else where prices are consistently increasing. For example, if an index increases 10-20% over a relatively brief period of time, it is said to be in a bull market. There is a great deal of money that can be made in a bull market, but the danger exists that a bull market can undergo a price correction or become a speculative bubble. See also: Bear market.
A market in which the demand for an asset swamps supply to the point that prices rise above the level that would have been expected under more usual circumstances. A new issue in great demand by investors is an example of a sellers' market. Underwriters may have to allocate available shares of the issue to their clients, resulting in sharply higher prices once the shares begin trading in the secondary market. Compare buyers' market.