Market players said operators creating long positions amid a firm trend at the spot markets, largely supported the upside in mustard see prices in futures trade here.
At the National Commodity and Derivative Exchange, mustard seed delivery in December gained Rs 12 or 0.30 per cent to Rs 3,954 per quintal, having an open interest of 28,080 lots.
In a similar manner, the delivery for the most-active November rose Rs 10 or 0.26 per cent to Rs 3,918 per quintal, showing an open interest of 28,910 lots.