SpaceX (SPCX) canceled the test launch of its latest Starship rocket on Thursday due to engine ignition failure. The space venture's stock sinks lower ahead of Friday's close after already dropping below its mega-IPO price earlier this week. William Blair research analyst of industrials Louie DiPalma — whose firm maintains an Outperform rating on SpaceX's stock — comes on to talk more about the opportunities and risks ahead for Elon Musk's company.