Follow the latest news on the major headlines of the day. Stock in Elon Musk’s space and artificial intelligence company opened down Monday, with shares losing more than 10% of their value by mid-day at around $165. Shares are now trading around 20% lower than their high last week, when the company briefly eclipsed $200 a share. As a result, CNBC notes , the average investor who bought SpaceX shortly after its $135 IPO price has likely seen all of their gains disappear. Shares are still about