Rocket Lab USA is trading at $52.69, down 15.77%, after its October 14 announcement that Neutron’s first flight is now expected in 2027. - The company identified a manufacturing issue with the rocket’s forward propellant dome; Reuters reported the delay sent shares lower in extended trading. - Hotter-than-expected inflation and rising rate concerns are also weighing on markets. - Separate news about 12 hypersonic tests does not explain the decline.