Windfall gain

The term market gains or Q -earnings (English windfall profit or windfall gain) referred to in economics capital gains that are not based on corresponding powers of the profit earners, but caused by sudden, unusual changes in market conditions.

Examples are profits by increasing the value of a property by conversion to urban land or through public infrastructure works or profits due to higher market prices for the goods produced or unexpectedly lower raw material costs.

Taxation

In the U.S. in 1980, a windfall tax introduced due to sudden More profits of oil companies in connection with the former Arab oil embargo and abolished in 1988.

In the UK in 1997, a windfall tax, levied by the Labour government to privatized utilities, which paused a monopoly that would siphon off a portion of the disproportionate highly respected profits again.

The OECD criticized the fact that a windfall tax often do not meet those who received excessive profits because this group of people have already resold the shares concerned.