Charlie D was definitely the FIRST biggest 30-year bond local. He made the pit what it was in the late 1990's. I would say he definitely traded the largest % of the volume during his hey-day, which was early 1980's to a couple weeks before his death in 1991. He was a calendar spreader in the beginning of his career and then eventually moved to top-step and traded outrights (still with spreading mentality). Didn't like the spotlight like Baldwin, Kenyon, and the other big guys.