Carr, Peter; Geman, Hélyette; Yor, Marc; Madan, Dilip B. - 2010
Realized variance option and options on quadratic variation normalized to unit expectation are analyzed for the … property of monotonicity in maturity for call options at a fixed strike. When this condition holds the risk neutral densities … analysis of squared log returns on the S&P 500 index also reveals such a decrease. If options are priced to a slightly …