SpaceX set to begin trading after raising $75 billion in record IPO

SpaceX is set to begin trading Friday after completing the largest initial public offering in history, marking the long-awaited Wall Street debut of Elon Musk's rocket and satellite company. SpaceX on Thursday priced its shares at $135 each, raising $75 billion to finance its ambitious plans , which include establishing a human colony on Mars and putting solar-powered data centers in space. The shares will start trading after the Nasdaq Stock Exchange opens at 9:30 a.m. ET. …