Investors in small rocket launcher Rocket Lab USA (RKLB -18.17%) are having an exciting day on Thursday.Last night, Rocket Lab announced its first rocket launch of 2024, and its first recovery of a rocket from a water landing this year. The space company also announced the preliminary results for its fourth and final quarter of 2023. And how was that news? Here's a hint: Through 11 a.m. ET, Rocket Lab stock is down 18.6%.Rocket Lab Q4 sales and earnings"Based on the information available to us as of the dat ...