Rocket Lab's Neutron Maiden Flight Pushed to 2027 After Tank Defect, Analysts Trim Targets but Keep Faith

A manufacturing flaw buried in the carbon-fibre skin of a rocket's fuel tank has cost Rocket Lab a year of schedule — and, for one trading session, 8.2% of its market value. The stock closed Friday at EUR 45.25, a sharp markdown that reflects how quickly investors reprice a company whose growth story rests on a rocket that has yet to leave the ground.

At the centre of the sell-off is Neutron, the medium-lift vehicle meant to carry Rocket Lab beyond its small-satellite niche. Air pockets were found between the layers of the carbon-fibre composite forming the forward tank domes of the first stage. The company disclosed on Wednesday that the voids emerged after a change to its manufacturing process, and media reports have linked the defects directly to that procedural shift. Rocket Lab says it has since traced and corrected the root cause and is implementing improvements on the production line.

From Q4 2026 to 2027

The maiden launch, previously pencilled in for the fourth quarter of 2026, is now expected in 2027. Before any new date is fixed, further test campaigns must be completed. Management's caution is easy to justify on engineering grounds: a failed first flight — particularly an explosion — could set the programme back by years rather than months. Fixing flaws on the ground is quality control working as intended, not a failure of execution.

The market, though, had already priced in specific milestones, and the wait now required is considerably longer than investors had bargained for.

Two brokers, two haircuts, one message

Wall Street's response came in two stages. KeyBanc cut its price target to $100 on Thursday, citing the revised timeline alongside valuation pressure across high-growth space names. Citizens followed on Friday, reducing its target from $130 to $90 while keeping its Outperform rating — or Market Outperform, as the house styles it.

The fact that both firms slashed their targets yet left their positive ratings untouched tells its own story. Neither analyst doubts that Neutron is buildable; what they are adjusting for is the simple arithmetic of delayed revenue. A rocket is not merely a technological flagship — it is the foundation of a future business model, and when the premiere slips, the cash flows it was meant to generate slip with it.

A stock searching for a floor

Friday's close of EUR 45.25 leaves the shares 66% below their 52-week high, with no clear support level yet established. That drawdown is a test of patience for anyone already invested. It is also, arguably, a case study in how the sector treats its own: developing new launch vehicles means operating at the outer edge of what is physically achievable, and the market's tolerance for slippage at that edge is thin.

The operational base, however, has not stood still. While Neutron's schedule is reworked, Rocket Lab is preparing the next flight of its established Electron rocket for the customer HawkEye 360 — a reminder that a working fleet continues to generate business in the background.

Structural warning or overreaction?

The honest answer is that both readings have merit, and the evidence points more toward the second. Technical setbacks are the ordinary weather of launch-vehicle development; expecting a project of this complexity to reach the pad without a single adjustment ignores how the industry actually works. The recent slump captures the shock of the revised timeline, but it goes too far as a fundamental verdict. Rocket Lab has a functioning rocket line and is confronting its manufacturing problems head-on.

What remains to be proven is reliability in the tests still to come. Until those results land, the stock is likely to stay volatile — a proving ground, in more ways than one, for investors willing to sit through the swings that come with technologically demanding ventures.