Update at 1:15 p.m. PDT April 18: Google ends trading day up 20 percent, capturing largest one-day gain
Update at 10 a.m. PDT April 18: Google's gains have now reached 21 percent.
Google's shares closed with a 20 percent gain Friday, marking the largest-ever one-day gain for the Internet giant.
Google's stock closed at $539.41 per share, up $89.87 from the previous day when Google reported after the market's close its first-quarter earnings and blew past analysts' estimates.
During intra-day trading Friday, Google's stock rose as high as $545.11 … Read more