hypothesis and volatility approaches using monthly data on stock market indices from January, 2005 to April, 2016. Parametric …-form efficient. The volatility results suggest that monthly stock returns of OPEC countries are volatile, with Qatar being most … volatile and shocks to volatility of stock returns are asymmetric. The implications of this are that: first, investors should …

This paper revisits the fractional co-integrating relationship between ex-ante implied volatility and ex-post realized … volatility. Previous studies on stock index options have found biases and inefficiencies in implied volatility as a forecast of … future volatility. It is argued that the concept of corridor implied volatility (CIV) should be used instead of the popular …

This paper revisits the fractional cointegrating relationship between ex-ante implied volatility and ex-post realized … volatility. We argue that the concept of corridor implied volatility (CIV) should be used instead of the popular model …-free option-implied volatility (MFIV) when assessing the fractional cointegrating relation as the latter may introduce bias to the …

macroeconomic fundamentals emanating from Germany and the U.S. We examine the reaction of intraday returns and volatility of the CAC … immediate response in returns and volatility of the German and the French stock market sampled at a five-minute frequency. The …

hypothesis and volatility approaches using monthly data on stock market indices from January, 2005 to April, 2016. Parametric …-form efficient. The volatility results suggest that monthly stock returns of OPEC countries are volatile, with Qatar being most … volatile and shocks to volatility of stock returns are asymmetric. The implications of this are that: first, investors should …

macroeconomic fundamentals emanating from Germany and the U.S. We examine the reaction of intraday returns and volatility of the CAC … immediate response in returns and volatility of the German and the French stock market sampled at a five-minute frequency. The …

This paper constructs unbiased and model-free measures of daily and hourly volatility of the overnight interest rate … increases in volatility and the most notable variations of its intraday pattern occur at the end of the reserve maintenance … period and at the end of each quarter. The average effect on market volatility of Eurosystem money market operations and …