Quote from ChitownWally:
I know they have a couple of small traders in the bond options on the floor of the CBOT. I know they have a few guys in the 10yr; not sure about the 5 and 30, though. When I say "small," I mean that they're not really big players in the market, like DRW, Knight, or Wolverine (which is bigger at CBOE, by the way). I think they make a handful of trades a day....their clerks don't do shit all day.