Rocket Lab USA is trading 4.3% down at $66.30 on October 12, 2026, with the immediate reason uncertain. - The supplied price context shows declines on October 7 and 8, followed by a nearly flat close on October 9. - Broader indexes are nearly flat and do not clearly explain the move. - Recent reporting mentions dilution concerns tied to the Iridium acquisition, but does not directly attribute today’s drop to them.