Get alerts:Rocket Lab, Boeing, and AST SpaceMobile are the three Space stocks to watch today, according to MarketBeat’s stock screener tool. Space stocks are shares of publicly traded companies whose core businesses involve the development, production or operation of technologies and services for space exploration, satellite communications, launch vehicles and related activities. Investors buy these equities to gain exposure to the growing commercial space economy, from satellite manufacturing and Earth-observation services to space tourism and reusable rockets. These companies had the highest dollar trading volume of any Space stocks within the last several days. Rocket Lab (RKLB)Rocket Lab USA, Inc., a space company, provides launch services and space systems solutions for the space and defense industries.