Rocket Lab ( RKLB -7.64%) stock stumbled 8.2% through 11:30 a.m. ET Wednesday, giving back some of its mammoth 30% gain from Tuesday, a gain arising from investor enthusiasm over newly inaugurated President Trump's own excitement about using U.S. companies to send astronauts to Mars.

I believe that Rocket Lab remains a buy, even after the RKLB stock prices have risen over 400% since my earliest report on Rocket Lab post-IPO. See more here.

Rocket Lab (Nasdaq: RKLB), a global leader in launch services and space systems, saw its stock jump 28% in Tuesday’s trading following a significant announcement regarding a new agreement with NASA. The space company revealed that it will provide Neutron launch services to NASA under the agency’s existing Venture-Class Acquisition of Dedicated and Rideshare (VADR) contract.

Shares of Rocket Lab USA ( RKLB 28.44%) are flying on Tuesday. The stock is up 28.3% as of 2 p.m. ET but was up as much as 31.8% earlier in the day. The leap comes as the S&P 500 and the Nasdaq Composite gained 0.9% and 0.6%, respectively.