Dynamic spillover transmission in agricultural commodity markets: What has changed after the COVID-19 threat?

Abstract

This paper applies the dynamic Diebold–Yilmaz and Baruník–Křehlík spillover indices to document a closer integration between agricultural commodity markets in the period when markets rebounded after the COVID-19 threat to the Russia–Ukraine​ war. We also identified the record return spillover transmission among agricultural commodities during a time of conflict and the strongest transmitters are wheat, maize and barley. The findings emphasise an increasing uncertainty to the global food market.