Alphabet posts strong revenue on video market, stock surges

Alphabet Inc , Google's parent, on Thursday revealed that efforts to push its vast advertising business toward mobile is paying off as second quarter earnings handily beat Wall Street's expectations. The results put to rest lingering concerns about how the rise of mobile might impact Google, which has a strong mobile presence with its Android smartphone operating system but has long relied on desktop search traffic to power its profits. Advertisers typically pay less for user clicks on mobile ad