At the National Commodity and Derivatives Exchange, refined soya oil for delivery in July fell by Rs 4, or 0.63 per cent to Rs 634.90 per 10 kg with an open interest of 29,460 lots.
Likewise, the oil for delivery in June contracts traded lower by Rs 3.10, or 0.49 per cent to Rs 633.40 per 10 kg in 48,450 lots.
Analysts said that trimming of positions by participants on the back of sufficient stocks position on increased supplies from producing belts against lower demand, mainly kept refined soya oil prices down at futures trade.