Michael M. Santiago / Getty Images The Cboe Volatility Index (VIX) jumped to a four-year high on Monday, sending VIX ETFs surging amid a broad stock selloff. Volatility ETFs do not mirror the VIX ...

The Cboe Volatility Index, an options-based gauge of expected volatility in the S&P 500 widely known by its trading symbol, VIX, jumped Monday morning to its highest level since December.

The Cboe Volatility Index, or VIX, climbed to 22.78 on Monday. That is its highest closing level since the day after the Federal Reserve’s December meeting, when the central bank’s wait-and ...

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Hedging stock-market risk by buying VIX calls has become such a popular trade that it could turn into a destabilizing force, some strategists warn. More than 1 million call options on the Cboe ...