June 12 : U.S. space stocks tumbled on Friday as investors rushed to lock in gains on the day of SpaceX's market debut, snapping a months-long rally fueled by anticipation over the blockbuster IPO. The Elon Musk-led company jumped 28 per cent, clinching a valuation of over $2 trillion as both institutional investors and retail traders piled onto the world's biggest stock market listing. That frenetic buzz around the IPO has put the spotlight on the once-niche space sector, stoking investor