Mustard seed prices looked up by Rs 9 to Rs 4,073 per quintal in futures trade as traders created fresh positions in sync with higher physical markets sentiment. Pick up in demand from oil mills amid halt in arrivals from growing belts in the spot markets, encouraged traders to build up exposure, which reflected the upturn in mustard seed futures prices. At the National Commodity and Derivatives Exchange, mustard seed delivery for July went up by Rs 9, or 0.22 per cent, to Rs 4,073 per quintal.