New Delhi, 04 October (NNS): The prices of big cardamom Jhundiwali improved by Rs 10 to Rs 990 per kg due to the strong offtake at the higher level. Before this, the prices have gone up by Rs 30/40 per kg. The average auction price rose to Rs 800/1187 per kg in the auction which held on 28 September, due to this, the market sentiments may affect. There is no fear of downtrend in the prices during the coming days.