We explore the impacts of economic and financial dislocations caused by COVID-19 pandemic shocks on food sales in the United States from January 2020 to January 2021. We use the US weekly economic index (WEI) to measure economic dislocations and the Chicago Board Options Exchange volatility...

We investigate the predictive power of the Efficient Market Hypothesis (EMH) and rational expectations (RE) during periods of economic shocks – specifically COVID-19, captured by the response of the CBOE’s volatility index (VIX) to the newly compiled weekly economic index (WEI). We extend...

In the present study, we propose a simple test approach based on the work of Breitung and Candelon (2006), which allows us to test for asymmetric predictability at a pre-specified frequency. The test approach can also be used to test for causality in cointegrated systems, as illustrated by...