Commodities World food security at risk as exporters curb sales, importers buy more Updated : March 26, 2020 02:48 PM IST India, the top global rice exporter, has just entered a three-week lockdown that has brought several logistics channels to a halt. Vietnam, the third largest rice exporter, and Kazakhstan, the number nine wheat exporter, have already made moves to restrict sales of those staples amid concerns over domestic availability. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.