A model-free methodology is used for the first time to estimate a daily volatility index (VIBEX-NEW) for the Spanish financial market.We use a public data set of daily option prices to compute this index and showthat daily changes in VIBEXNEW display a negative, tight contemporaneous...

A model-free methodology is used for the first time to estimate a daily volatility index (VIBEX-NEW) for the Spanish financial market.We use a public data set of daily option prices to compute this index and showthat daily changes in VIBEXNEW display a negative, tight contemporaneous...

There is little evidence in support of a normal distribution for most financial assets, including the VIX. This paper concludes that the lambda parameter, in the one-parameter Box & Cox (1964) family, appropriate for VIX to be normal, is minus one (expected precision), which is very far from...

A number of fundamental questions regarding the equity-index return dynamics are difficult to address due to the latent character of spot volatility. We exploit tick-by-tick option quotes to compute a novel "Corridor Implied Volatility,'' or CX, index which may serve as an observable proxy for...

This paper proposes a variant application of the Merton distance-to-default model by employing implied volatility and implied cost of capital to predict defaults. The proposed model's results are compared with predictions obtained from three popular models in different setups. We find that our...

This paper proposes a variant application of the Merton distance-to-default model by employing implied volatility and implied a cost of capital to forecast defaults. The proposed model's results are compared with predictions obtained from three popular models in different setups. We find that...