Urbano Salvador, Amparo - In: SERIEs : Journal of the Spanish Economic Association 2 (2011) 2, pp. 139-158
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...
