Summary: After September eleventh many authorities officers have turn into involved with the potential for terrorists launching assaults on the U.S. by means of the web. Cybersecurity in industries that type our financial system’s “crucial infrastructure” have been of specific concern. This paper examines the economics of cybersecurity. The economics of externalities, public items, market failure, and authorities failure are all explored as they relate to cybersecurity. The monetary providers trade is clearly an space of crucial infrastructure in our financial system. This trade gives a case examine to look at whether or not the market is offering the environment friendly stage of cybersecurity or whether or not authorities intervention is required.