Maybe now Mark Zuckerberg will take off his hoodie and speak in public more often? Facebook stocks jumped 6.2 percent in trading on Friday, days after the young CEO reassured investors about the company’s growth at a digital conference—his first public appearance since the company’s shaky IPO. During the conference, a confident Zuck emphasized progress in social juggernaut’s mobile platform and suggested Facebook could enter the search market—a move with huge money-making potential. The company is also rolling out a new ad service that gives marketers better ways to reach consumers on the site. Facebook’s shares are up 13 percent since Zuckerberg spoke at the conference on Tuesday and has gained $6.8 billion in additional market value.