On June 18, Rocket Lab USA declined 3.01% in regular trading, trading at $102.88/share, with turnover of $6.13 billion. The decline came as space concept stocks faced broad-based selling pressure across the sector.

On the news front, multiple space-related stocks declined in tandem, with AST SpaceMobile leading losses at over 8%, SpaceX falling more than 6%, and Intuitive Machines dropping over 5%. The sector-wide pullback is attributed to the ongoing capital siphoning effect following SpaceX's landmark IPO — its market capitalization surpassed $2 trillion on its debut, drawing significant fund flows and investor attention toward the industry giant. Market participants believe institutional investors have been reducing existing space sector holdings to reallocate capital toward SpaceX, creating systematic pressure on mid- and small-cap space stocks.

Notably, Rocket Lab had gained over 5% just one session prior, buoyed by KeyBanc's upgrade to Overweight with a $135 price target and expectations surrounding its June 22 inclusion in the Nasdaq-100 Index.

(The above content is based on publicly available market information, generated by a program or algorithm, and is intended solely as a stock movement alert. It does not constitute investment advice or a basis for trading decisions.)