Grain prices had been trending downwards since 2012 but have rallied more than 45% in six months, according to Vontobel Asset Management's head of commodities, Michel Salden. Reuters
Grain prices had been trending downwards since 2012 but have rallied more than 45% in six months, according to Vontobel Asset Management's head of commodities, Michel Salden. Reuters

Investors bullish on prospects for commodities