 is a partially reusable medium-lift two-stage rocket being developed by Rocket Lab. It has been scheduled to launch in 2025, but might slip to the further date.

This market will be resolved when Neutron rocket launches for the first time. For the purposes of this question, "launch" should involve the countdown reaching 0 and the rocket leaving the pad. I.e. 

 would count, but an explosion right on the pad wouldn't.

If there is sufficient interest in this market, I'll add further markets about other milestones for Rocket Lab rockets.