SAN FRANCISCO: Facebook shares rocketed to an all-time high on Thursday as investors welcomed solid earnings for the social networking giant, which has seen big gains in advertising and better connections in mobile and video. Shares in Facebook rose 4.6 per cent to close at $108.76, pushing the company’s market value to more than $306 billion. The stock, which struggled following its public offering in 2012, has seen spectacular gains from the low of $17.72 in September 2012. Facebook’s market value is now roughly equal to that of online giant Amazon ($307 billion) and above that of industrial conglomerate General Electric ($299 billion). However, it remains well below the world’s biggest company by market value, Apple ($674 billion), Google parent Alphabet ($523 billion) and Microsoft ($434 billion).