SpaceX pops 11% at open after biggest U.S. IPO in history

SpaceX shares rose 11% in initial trades Friday, placing the company in the top 10 largest companies in the U.S.Why it matters: The $150 price indicates a $1.97 trillion market cap, putting it immediately among the top 10 largest U.S. companies.Driving the news: SpaceX shares priced late Thursday afternoon at $135.If SpaceX were included in the S&P 500 today, it would be over 5% of the overall index based on its current valuation.What they're saying: "I gave SpaceX less than a 10% chance of...