Stock Market Today, June 30: Rocket Lab Soars on Acquisition and Major Indexes Gain

Rocket Lab (RKLB) surged on June 30, 2026, after announcing an $8 billion acquisition of Iridium Communications, driving the Nasdaq Composite up 1.52% and marking the index's strongest quarter since 2020. The S&P 500 gained 0.79% on the same session, with tech and industrial sectors leading broader market gains.

The Iridium acquisition positions Rocket Lab to control both satellite manufacturing and an established communications constellation. The deal size represents a significant scale-up for the launch provider, which has been expanding beyond its core small-satellite launch business. Intel (INTC) also climbed 6% during the session on momentum in AI-related equities.

The June 30 close capped a quarter that outpaced any three-month period since the pandemic recovery rally in 2020, driven by sustained gains in technology stocks. Gold prices declined modestly during the session, though analysts cited potential for renewed rallies in July.