Default probability is a fundamental variable determining the credit worthiness of a firm and equity volatility estimation plays a key role in its evaluation. Assuming a structural credit risk modeling approach, we study the impact of choosing different non parametric equity volatility...

Equity returns and fi rm's default probability are strictly interrelated financial measures capturing the credit risk profi le of a fi rm. Following the idea proposed in [20] we use high-frequency equity prices in order to estimate the volatility risk component of a fi rm within Merton [17]...

The aim of this paper is to measure and assess the accuracy of different volatility estimators based on high frequency data in an option pricing context. For this, we use a discrete-time stochastic volatility model based on Auto-Regressive-Gamma (ARG) dynamics for the volatility.First, ARG...