SpaceX roared past Amazon’s market valuation on Tuesday and briefly topped that of Microsoft, rapidly scaling the list of the world’s most valuable companies on a topsy-turvy trading day fuelled by frenzied action in the firm’s newly listed option contracts. SpaceX shares rose 4.8 per cent to close at US$201.80, giving Elon Musk’s company a market value of roughly US$2.655 trillion – some US$800 billion more than its value when it sold its record initial public offering last week and about...