After the market closed on 14 October, Rocket Lab said in a press release and a Form 8-K filing that the first launch of Neutron, its reusable medium-lift rocket, is now expected in 2027 rather than the fourth quarter of 2026. The company cited continued development and process improvements. It gave no new date, no cost and no change to guidance. The shares fell about 6% in extended trading, below a $59.18 close that came before the news.

It is the second move this year. A stage 1 tank burst in a pressure test on 21 January, pushing the target from mid-2026 to late 2026.

Does the delay hurt earnings?

Only a little. Neutron earns no revenue today, and early flights of a new rocket carry thin margins. The updated report estimates the slip takes about $82m, roughly 6%, off 2027 revenue against the old timetable. It also assumes about $40m of extra development spending, a figure the company has not given. That is about $0.06 a share, roughly all of consensus 2027 adjusted EPS. Electron, Space Systems and the $2.36bn backlog are unaffected.

So where is the damage?

In the multiple. The report cuts base-case fair value to $55 from $70, and the probability-weighted value to $52. On its own sizing, the delay removes about $7.60 a share, roughly half from lower revenue and half from a lower multiple. The after-hours fall roughly matches that, suggesting the market priced a short delay, not a failure. The watch price moves to $45 from $58; there the base case would pay about 22%.

Why not change the rating?

Watchlist holds, on different grounds. At $59.18 the $55 base case offers no return. The $72 bull case needs a first-half 2027 flight the company has not promised. The bear case, a slip into 2028 or a failed first flight, is worth $33. Even on the old timetable the base case would sit near $62, still a Watchlist. The shares hit the old $58 level only through a tech sell-off and a setback to the thesis, so that trigger does not apply.

What should readers watch?

Third-quarter results are expected on 9 November, a date the company has not yet confirmed. That call should say where in 2027 the flight sits and what the extra time costs. Next come the vehicle’s arrival at Launch Complex 3 in Virginia and an integrated static fire, which chief executive Peter Beck called the highest-risk step. Then the flight itself, which carries real risk: first flights of new rockets often fail, and Electron’s own debut did not reach orbit.

The Neutron sizing and revised levels are in the complete Rocket Lab (RKLB) report on our Reports page.