The Cboe Volatility Index rose 20% Monday as Facebook and other technology companies dragged U.S. stocks lower, in its biggest gain since Feb. 8. The volatility index, called the VIX, surged as much as 38% during the trading day, the biggest intraday gain since Feb. 5, when the gauge more than doubled. “The thing to watch out for this time...

Source: Wall Street Journal March 19, 2018 21:22 UTC