How Much Should This Fall Change Your View Of Rocket Lab Stock?

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Shares of Rocket Lab (RKLB) fell 20.7% between October 13 and October 20, 2026, while the S&P 500 slipped 1.2%. The decline followed the company’s October 14 announcement that Neutron, its new and larger rocket, will not make its first launch until 2027. So which parts of Rocket Lab’s business does the delay reach?

Which Parts Of Rocket Lab Does Neutron’s Delay Reach?

The delay affects the part of Rocket Lab that has not started earning yet. The company had targeted a first launch in the fourth quarter of 2026, but cited a manufacturing flaw in a carbon-composite propellant dome on the first stage. Rocket Lab expects to complete testing in the first quarter of next year and set a launch date afterward.

The news was not a full surprise, since management had said on the August 10 call for the second quarter of fiscal 2026 that the window for a launch by year end was narrowing. Still, the setback was Rocket Lab’s own: Lockheed Martin, Northrop Grumman and L3Harris Technologies all rose over the same dates.

Management brought Neutron to market at $50 million to $55 million a launch. Its first flight, now set for 2027, is what management called the initial test flight. Rocket Lab draws its revenue today from existing businesses, with Launch Services bringing in 33.1% of fiscal 2025 revenue and Space Systems the rest.

In August, management said capital spending would stay high as Neutron moves toward its first flight. Pushing that flight to 2027 means the spending lasts longer. Free cash flow over the four quarters to June 30, 2026 was negative $371 million, compared with negative $204 million a year earlier.

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How Rocket Lab Stock Is Priced After The Fall

Even after the fall, Rocket Lab stock is priced for growth that has not yet turned into profit. At $50.90, the shares trade at 41.7 times the company’s revenue over the past twelve months, against 3.1 times for the S&P 500. Because Rocket Lab still loses money, its price-to-earnings ratio is not meaningful.

That price appears to assume years of fast growth ahead. The risk to a holder is time, because each quarter Neutron waits is another quarter of spending before the rocket earns its first launch fee.

Rocket Lab’s Reported Growth Stands Where It Was

Rocket Lab’s reported results stand where they did before October 14. Revenue in the second quarter of fiscal 2026 was $234 million, up 62% from a year earlier. Over the four quarters to June 30, the operating loss came to 29.1% of revenue, down from 44.1% a year before.

Rocket Lab ended June with about $2.36 billion in total backlog. It also held $2.30 billion in cash and short-term investments against $134 million of debt, so the company is paying for the wait from its own balance sheet.

The delay moved Neutron’s date, not these figures. When Rocket Lab reports on November 9, 2026, the number to watch is third-quarter revenue against management’s guide of $250 million to $265 million.

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