Mr Rattray said that the rise of volatility-linked products had resulted in a distortion of the Vix index as a reliable indicator of market risk, and inadvertently created more risk for risk models that relied on Vix as an input.
“I think the Vix is being used by banks as an important input into models for risk management, credit spreads, bid-ask spreads. The fact that is has been wired into all of these ways of measuring risk is worrying to me,” he said.
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