Introduction -- Part I. Asset Pricing -- Chapter 1. Oil Price Uncertainty: Panel Evidence from the G7 and BRICS Countries -- Chapter 2. Climate Risk and the Volatility of Agricultural Commodity Price Fluctuations: A Forecasting Experiment -- Chapter 3. Linking the COVID-19 Epidemic and Emerging...

We consider fundamental questions of arbitrage pricing arising when the uncertainty model incorporates volatility uncertainty. With a standard probabilistic model, essential equivalence between the absence of arbitrage and the existence of an equivalent martingale measure is a folk theorem, see...

This paper proposes a latent dynamic factor model for low- as well as high-dimensional realized covariance matrices of stock returns. The approach is based on the matrix logarithm and allows for flexible dynamic dependence patterns by combining common latent factors driven by HAR dynamics and...