Market Turmoil Turns Nightmare for Volatility's Biggest Backer

  • Cboe sees $4 billion in market value vanish during wild week
  • Exchange says big swings are best advertising for its products
Pravit Chintawongvanich Says VIX Had Biggest Overreaction to Selloff
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Cboe Global Markets Inc. helped make the business of volatility famous, but investors have given the Chicago-based exchange about $4 billion of punishment because of it.

That’s how much value has been wiped off its market capitalization during one of the wildest weeks for markets in recent memory -- precisely the time you’d think the company would be thriving. But several funds tied to Cboe’s VIX index -- the core of its volatility franchise -- lost billions of dollars, prompting criticism of the risks they created and heightening speculation that traders will back off VIX products.