YouTube ad revenue provided a bright spot in an otherwise mixed quarter for Google parent Alphabet. In the period ended December 31, the tech giant reported revenue of $96.5 billion and earnings per share of$2.15. While those key metrics marked an improvement over the prior-year quarter and were largely in line with Wall Street forecasts, investors reacted badly to a miss on cloud revenue and a higher-than-expected outlook for capital expenditures. Shares plunged 6% in after-hours trading as the earnings ...