Wall Street's favorite fear gauge soared more than 13 percent Monday, reflecting trader sentiment that the stock market is likely to move lower.

Traders at New York Stock Exchange.

The Chicago Board Options Exchange Volatility Index again climbed past the 30 level amid a gloomy outlook for the global economythat presaged a sharp negative move from stocks. A reading of 30 or better is generally indicative of high volatility and seen as a bearish sign for the broad-based Standard & Poor's 500 index.