According to marketmen, the persistent rise in mustard seed prices at futures trade was mostly backed by building up of long positions by participants on firm trend at the spot markets on increased demand form oil mills amid tight supplies from growing resigns.
At the National Commodity and Derivative Exchange, mustard seed for delivery in December added another Rs 21 or 0.53 per cent to Rs 4,023 per quintal, having an open interest of 38,710 lots.