Financial markets and agricultural commodities: volatility impulse response analysis

The recent global food crisis has caused an increase in agricultural market volatility, raising important questions on the determinants of this instability. Many studies have analyzed this issue focusing on main factors affecting price volatility, as past volatility and trends, transmission across prices, oil price volatility, export concentration, stock levels and yields (Balcombe, 2010). Existing empirical literature identifies different drivers of volatility; among them, financialization and speculation are by far one of the most important. Indeed, with the introduction of agricultural commodity as an alternative asset class in investment portfolios, and the consequent increasing integration between commodity markets and major financial markets, there has been a growing convergence of risk-adjusted returns on assets class across markets, and an increase in the risk of volatility spillovers from outside to commodity markets due to portfolio rebalancing of institutional investors (Adams and Gluck, 2015).