With about five minutes remaining in the trading day, the company posted a statement on its official website under the headline: "Announcing the Tesla Model W." In the following minute, the stock jumped about $1.50 or about 0.75 percent from its level the moment before to as high as $188.50. Nearly 400,000 shares traded in that time, and it was the heaviest one minute of trading volume in the stock since the opening 60 seconds of trading on Feb 12. (fortune.com)