What are super normal profits made by companies due to

Solution

Windfall gain (or windfall profit) is an unexpected gain in income from an unforeseen source/event. Windfall gains may take place due to sudden steep rise in prices of a commodity or extreme shortage of a resource, asset or product. For an individual, windfall gain could be a sudden spike in income due to one-time events like inheritance of property, money gained on selling property when its prices increase dramatically, etc. Windfall gain may also refer to gains from winning a lottery, betting income etc. A windfall tax is a one-off tax imposed by a government on a company on such windfall gains, which is over and above the normal rates of tax.