The Business of Banks???
There is no economic or systemic reason why derivatives should be sold by banks. As the entry of large investment banks into the business in the 1980s suggests, it is not tied to the traditional deposit-taking and lending activities of banks or to the payments system. It is, in fact, so esoteric an activity that, currently, only five institutions account for 90 percent of the market. The remaining 8,000 or so U.S. banks do not sell derivatives or trade them for their own account.