By 1992 Zimmerman was a floor trader at Lee B. Stern & Company where his "questionable billion-dollar trades jolted the Treasury bond market".
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After working briefly trading in the Vancouver financial market, Zimmerman moved to Chicago and became a trader at the Chicago Board of Trade in 1985; He worked first as an entry-level clerk on the floor.
On October 22, 1992, Darrell Zimmerman of Chicago, Illinois and Anthony Catalfo of Bayside, Queens, New York, attempted to manipulate the US Treasury bond futures and options market of the Chicago Board of Trade (CBOT).
Darrell Green | Darrell Waltrip | Eric Zimmerman | Darrell Scott | Darrell Hair | Paul Zimmerman | Darrell Issa | Darrell Evans | Ryan Zimmerman | Michael E. Zimmerman | George Zimmerman | Elwood Zimmerman | Darrell's Island, Bermuda | Ron Zimmerman | Leroy M. Zimmerman | Franklin B. Zimmerman | Eugene Zimmerman | Darrell Whitmore | Darrell Steinberg | Darrell's Island | Darrell Schweitzer | Darrell Guder | Darrell Goulding | State of Florida v. George Zimmerman | Patric Zimmerman | Michael E. Zimmerman (philosopher) | Leigh Zimmerman | John Zimmerman (figure skater) | John Zimmerman | John C. Zimmerman, Sr. |