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A period of rapid, strong economic and/or stock growth. For example, some developing countries post GDP growth of 10-12% per year, especially after they have liberalized their economic policies. Likewise, some stocks may become suddenly very popular, resulting in a boom. The dot-com bubble is one of the most famous examples of a stock boom. The problem with booms is that the growth is rarely sustainable, as investors become more and more speculative and take needless risks. Thus, most booms ultimately result in busts. Many economists believe the boom-and-bust cycle is an inevitable part of doing business, while others believe that government regulation can limit both booms and busts.