 Shares of Graf Industrial NYSE: GRAF gained 20 on Thursday after the special purpose acquisition company SPAC announced plans to merge with a maker of sensors for self-driving vehicles. The deal would move its merger partner, Velodyne Lidar, onto public markets, joining a host of other companies to use SPACs to go public in recent months. Velodyne Lidar said Thursday it would combine with Graf Industrial to create a company with a pro forma market capitalization of 1.8 billion. 