Quote from frank_london:
That is not true. On the release of an ECO # everything moves at the same time(or within milliseconds) unless someone gets wind of actual release or its released early by one of the wires early, like Reuters has done on the Employment Report in the past. Even if it where true that the ZN sometimes led it is not actionable. Are you going to put on an es trade if the bonds jump a few ticks at 7:29:57? before the CPI release.
The reason its not true is that now there are "quant. bots." that trade the release of ECO #'s within milliseconds of the release, much faster then any human could react and across all markets that release is relevant to. So bonds/notes will not go first. I've been trading along time and know people/ firms that do this. I used to game the release of ECO #'s but it is no longer viable, now you must wait to play the reaction.
P.S. I was using Bloomberg and Reuters to game the #'s