A boom refers to a period of increased commercial activity within either a business, market, industry or economy as a whole. For an individual company, a boom means rapid and significant sales growth, while a boom for a country is marked by significant GDP growth. A company or industry boom results in an increase of output, jobs and investment in that industry.
Certain events can be citywide or nationwide booms for business activity, such as hosting the Olympics, which translates into capital investment, TV broadcasting deals, sponsorship deals and tourism. Conversely, a downturn in a particular industry or financial sector can result in a bust for an entire city or state, especially if the region has invested too heavily in that industry or sector.