decomposing realized volatility in its continuous and discontinuous jump component. First, we analyze the relation between … volatility and trading activity. Coherent with existing studies we find that the driving factor of the relation between … Data ; Realized Volatility ; Price Jump ; Trading Activity ; Urgent Market Message …

electricity price volatility. We use emergency outages of coal generators as an exogenous source of variation in the power …

which succeeds with high probability. -- Hedging ; superhedging ; Neyman Pearson lemma ; stochastic volatility ; value at …

In a tractable stochastic volatility model, we identify the price of the smile as the price of the unspanned risks … traded in SPX option markets. The price of the smile reflects two persistent volatility and skewness risks, which imply a …-form and structural models of stochastic volatility …

We study a new class of three-factor affine option pricing models with interdependent volatility dynamics and a … stochastic skewness component unrelated to volatility shocks. These properties are useful in order (i) to model a term structure … of implied volatility skews more consistent with the data and (ii) to capture comovements of short and long term skews …

realized volatility and its continuous and jump components. Considering buyer-initiated and seller-initiated trades and … investigate whether buyer and seller initiated trades as two factors of realized volatility, we investigate whether they have an … asymmetric effect on realized volatility. The stocks in the ASX50 sampled over the period January 1996 to April 2010 reveal that …

volatility jump diffusion model …