SpaceX makes record-breaking stock market debut

SpaceX, Elon Musk's rocket and artificial intelligence company, is set to begin trading on the stock market Friday. The highly anticipated debut is being closely watched and could influence how investors view other A.I. companies looking to go public. The company has already completed the largest stock market debut ever. SpaceX says its stock was priced at $135 per share and that more than 555 million shares will be sold.