What it is:
"Big Blue" is a nickname for IBM.
How it works (Example):
According to IBM, the name "came about organically" and has no single source. The company says the first official reference to the company as Big Blue was in a BusinessWeek article published on June 8, 1981. The article states that the nickname came from "the pervasiveness of IBM's blue computers."
Why it Matters:
Like any other industry, the finance world has its own slang and colorful language.