According to market players, bets grew on the back of heavy demand for oil mills, triggered by festive season, amid thin supplies from growing regions.
At the National Commodity and Derivative Exchange counter, mustard seed delivery for the most traded October contract hardened by Rs 18, or 0.38 per cent, to Rs 3,763 per quintal, with an open interest of 35,110 lots.
Likewise, the delivery for the November contract edged up by Rs 15, or 0.39 per cent, to Rs 3,843 per quintal, having an open interest of 23,720 lots.