Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
The Chicago Research and Trading Group was a futures and options trading firm. It was founded in 1977, by Joe Ritchie and was bought out by NationsBank in 1993.
References
Dominic Casserley (1993). Facing Up to the Risks: How Financial Institutions Can Survive and Prosper. John Wiley & sons. pp. 139-144.