The Graphic Truth: Silicon Valley's Wild Ride

Google's Pichai is just the latest Silicon Valley leaders to travel to Washington to speak with Congress – following trips by the CEOs of Facebook and Twitter earlier this year. The firms in the fastest growing industry in the US have suffered under the weight of calls for heightened regulatory scrutiny and increased sensitivity to the politically disruptive impact of their business models. Here's a look at the wild ride in their share prices over the past 18 months.